Pulmonary Infections

COVID-19 has lifted the lid on the risks of secondary pulmonary fungal infections in patients with severe respiratory viral illness – even previously immunocompetent individuals – and highlighted the importance of vigilant investigation to achieve early diagnoses, leading experts say.

Kathryn Kon/Science Photo Library/Getty Images

Most fungi are not under surveillance in the United States, leaving experts without a national picture of the true burden of infection through the pandemic. However, a collection of published case series, cohort studies, and reviews from Europe, the United States, and throughout the world – mainly pre-Omicron – show that fungal disease has affected a significant portion of critically ill patients with COVID-19, with concerning excess mortality, these experts say.

COVID-associated pulmonary aspergillosis (CAPA) has been the predominant fungal coinfection in the United States and internationally. But COVID-associated mucormycosis (CAM) – the infection that surged in India in early 2021 – has also affected some patients in the United States, published data show. So have Pneumocystitis pneumonia, cryptococcosis, histoplasmosis, and Candida infections (which mainly affect the bloodstream and abdomen), say the experts who were interviewed.

“We had predicted [a rise in] aspergillosis, but we saw more than we thought we’d see. Most fungal infections became more common with COVID-19,” said George Thompson, MD, professor of clinical medicine at the University of California, Davis, and cochair of the University of Alabama–based Mycoses Study Group Education Committee, a group of experts in medical mycology. Pneumocystitis, for instance, “has historically been associated with AIDS or different types of leukemia or lymphoma, and is not an infection we’ve typically seen in our otherwise healthy ICU patients,” he noted. “But we did see more of it [with COVID-19].”

More recently, with fewer patients during the Omicron phase in intensive care units with acute respiratory failure, the profile of fungal disease secondary to COVID-19 has changed. Increasing proportions of patients have traditional risk factors for aspergillosis, such as hematologic malignancies and longer-term, pre-COVID use of systemic corticosteroids – a change that makes the contribution of the viral illness harder to distinguish.

Moving forward, the lessons of the COVID era – the fungal risks to patients with serious viral infections and the persistence needed to diagnose aspergillosis and other pulmonary fungal infections using bronchoscopy and imperfect noninvasive tests – should be taken to heart, experts say.

“Fungal diseases are not rare. They’re just not diagnosed because no one thinks to look for them,” said Dr. Thompson, a contributor to a recently released World Health Organization report naming a “fungal priority pathogens” list.

“We’re going to continue to see [secondary fungal infections] with other respiratory viruses,” he said. And overall, given environmental and other changes, “we’re going to see more and more fungal disease in the patients we take care of.”


 

CAPA not a surprise

CAPA is “not an unfamiliar story” in the world of fungal disease, given a history of influenza-associated pulmonary aspergillosis (IAPA), said Kieren A. Marr, MD, MBA, adjunct professor of medicine and past director of the transplant and oncology infectious diseases program at Johns Hopkins University, Baltimore, who has long researched invasive fungal disease.

European researchers, she said, have led the way in describing a high incidence of IAPA in patients admitted to ICUs with influenza. In a retrospective multicenter cohort study reported in 2018 by the Dutch-Belgian Mycosis Study group, for instance, almost 20% of 432 influenza patients admitted to the ICU, including patients who were otherwise healthy and not immunocompromised, had the diagnosis a median of 3 days after ICU admission. (Across other cohort studies, rates of IAPA have ranged from 7% to 30%.)

Mortality was significant: 51% of patients with influenza and invasive pulmonary aspergillosis died within 90 days, compared with 28% of patients with influenza and no invasive pulmonary aspergillosis.

Reports from Europe early in the pandemic indicated that CAPA was a similarly serious problem, prompting establishment at Johns Hopkins University of an aggressive screening program utilizing biomarker-based testing of blood and bronchoalveolar lavage (BAL) fluid. Of 396 mechanically ventilated COVID-19 patients admitted to Johns Hopkins University hospitals between March and August 2020, 39 met the institution’s criteria for CAPA, Dr. Marr and her colleagues reported this year in what might be the largest U.S. cohort study of CAPA published to date.

“We now know definitively that people with severe influenza and with severe COVID also have high risks for both invasive and airway disease caused by airborne fungi, most commonly aspergilliosis,” Dr. Marr said.

More recent unpublished analyses of patients from the start of the pandemic to June 2021 show persistent risk, said Nitipong Permpalung, MD, MPH, assistant professor in transplant and oncology infectious diseases at Johns Hopkins University and lead author of the cohort study. Among 832 patients with COVID-19 who were mechanically ventilated in Johns Hopkins University hospitals, 11.8% had CAPA, he said. (Also, 3.2% had invasive candidiasis, and 1.1% had other invasive fungal infections.)

Other sources said in interviews that these CAPA prevalence rates generally mirror reports from Europe, though some investigators in Europe have reported CAPA rates more toward 15%.

(The Mycoses Study Group recently collected data from its consortium of U.S. medical centers on the prevalence of CAPA, with funding support from the CDC, but at press time the data had not yet been released. Dr. Thompson said he suspected the prevalence will be lower than earlier papers have suggested, “but still will reflect a significant burden of disease.”)

Patients in the published Johns Hopkins University study who had CAPA were more likely than those with COVID-19 but no CAPA to have underlying pulmonary disease, liver disease, coagulopathy, solid tumors, multiple myeloma, and COVID-19–directed corticosteroids. And they had uniformly worse outcomes with regards to severity of illness and length of intubation.

How much of CAPA is driven by the SARS-CoV-2 virus itself and how much is a consequence of COVID-19 treatments is a topic of active discussion and research. Martin Hoenigl, MD, of the University of Graz, Austria, a leading researcher in medical mycology, said research shows corticosteroids and anti–IL-6 treatments, such as tocilizumab, used to treat COVID-19–driven acute respiratory failure clearly have contributed to CAPA. But he contends that “a number of other mechanisms” are involved as well.

“The immunologic mechanisms are definitely different in these patients with viral illness than in other ICU patients [who develop aspergilliosis]. It’s not just the corticosteroids. The more we learn, we see the virus plays a role as well, suppressing the interferon pathway,” for example, said Dr. Hoenigl, associate professor in the division of infectious diseases and the European Confederation of Medical Mycology (ECMM) Center of Excellence at the university. The earliest reports of CAPA came “when ICUs weren’t using dexamethasone or tocilizumab,” he noted.

In a paper published recently in Lancet Respiratory Medicine that Dr. Hoenigl and others point to, Belgian researchers reported a “three-level breach” in innate antifungal immunity in both IAPA and CAPA, affecting the integrity of the epithelial barrier, the capacity to phagocytose and kill Aspergillus spores, and the ability to destroy Aspergillus hyphae, which is mainly mediated by neutrophils.

The researchers ran a host of genetic and protein analyses on lung samples (most collected via BAL) of 169 patients with influenza or COVID-19, with and without aspergillosis. They found that patients with CAPA had significantly lower neutrophil cell fractions than patients with COVID-19 only, and patients with IAPA or CAPA had reduced type II IFN signaling and increased concentrations of fibrosis-associated growth factors in the lower respiratory tracts (Lancet Respir Med. 2022 Aug 24).

Tom Chiller, MD, MPH, chief of the Center for Disease Control and Prevention’s Mycotic Disease Branch, said he’s watching such research with interest. For now, he said, it’s important to also consider that “data on COVID show that almost all patients going into the ICUs with pneumonia and COVID are getting broad-spectrum antibiotics” in addition to corticosteroids.

By wiping out good bacteria, the antibiotics could be “creating a perfect niche for fungi to grow,” he said.


 

Diagnostic challenges

Aspergillus that has invaded the lung tissue in patients with COVID-19 appears to grow there for some time – around 8-10 days, much longer than in IAPA – before becoming angioinvasive, said Dr. Hoenigl. Such a pathophysiology “implicates that we should try to diagnose it while it’s in the lung tissue, using the BAL fluid, and not yet in the blood,” he said.

Some multicenter studies, including one from Europe on Aspergillus test profiles in critically ill COVID-19 patients, have shown mortality rates of close to 90% in patients with CAPA who have positive serum biomarkers, despite appropriate antifungal therapy. “If diagnosed while confined to the lung, however, mortality rates are more like 40%-50% with antifungal therapy,” Dr. Hoenigl said. (Cohort studies published thus far have fairly consistently reported mortality rates in patients with CAPA greater than 40%, he said.)

Bronchoscopy isn’t always pragmatic or possible, however, and is variably used. Some patients with severe COVID-19 may be too unstable for any invasive procedure, said Dr. Permpalung.

Dr. Permpalung looks for CAPA using serum (1-3) beta-D-glucan (BDG, a generic fungal test not specific to Aspergillus), serum galactomannan (GM, specific for Aspergillus), and respiratory cultures (sputum or endotracheal aspirate if intubated) as initial screening tests in the ICU. If there are concerns for CAPA – based on these tests and/or the clinical picture – “a thoughtful risk-benefit discussion is required to determine if patients would benefit from a bronchoscopy or if we should just start them on empiric antifungal therapy.”

Unfortunately, the sensitivity of serum GM is relatively low in CAPA – lower than with classic invasive aspergillosis in the nonviral setting, sources said. BDG, on the other hand, can be falsely positive in the setting of antimicrobials and within the ICU. And the utility of imaging for CAPA is limited. Both the clinical picture and radiological findings of CAPA have resembled those of severe COVID – with the caveat of cavitary lung lesions visible on imaging.

“Cavities or nodules are a highly suspicious finding that could indicate possible fungal infection,” said pulmonologist Amir A. Zeki, MD, MAS, professor of medicine at the University of California, Davis, and codirector of the UC Davis Asthma Network Clinic, who has cared for patients with CAPA.

Cavitation has been described in only a proportion of patients with CAPA, however. So in patients not doing well, “your suspicion has to be raised if you’re not seeing cavities,” he said.

Early in the pandemic, when patients worsened or failed to progress on mechanical ventilation, clinicians at the University of California, Davis, quickly learned not to pin blame too quickly on COVID-19 alone. This remains good advice today, Dr. Zeki said.

“If you have a patient who’s not doing well on a ventilator, not getting better [over weeks], has to be reintubated, has infiltrates or lung nodules that are evolving, or certainly, if they have a cavity, you have to suspect fungal infection,” said Dr. Zeki, who also practices at the Veterans Affairs Medical Center in San Diego. “Think about it for those patients who just aren’t moving forward and are continuing to struggle. Have a high index of suspicion, and consult with your infectious disease colleagues.”

Empiric treatment is warranted in some cases if a patient is doing poorly and suspicion for fungal infection is high based on clinical, radiographic, and/or laboratory evidence, he said.

The CDC’s Dr. Chiller said that screening and diagnostic algorithms currently vary from institution to institution, and that diagnostic challenges likely dissuade clinicians from thinking about fungi. “Clinicians often don’t want to deal with fungi – they’re difficult to diagnose, the treatments are limited and can be toxic. But fungi get pushed back until it’s too late,” he said.

“Fungal diagnostics is an area we all need a lot more help with,” and new diagnostics are in the pipeline, he said. In the meantime, he said, “there are tools out there, and we just need to use them more, and improve how they’re used.”

While reported CAPA thus far has typically occurred in the setting of ICU care and mechanical ventilation, it’s not always the case, Dr. Permpalung said. Lung and other solid organ transplant (SOT) recipients with COVID-19 are developing CAPA and other invasive secondary invasive fungal infections despite not being intubated, he said.

Of 276 SOT recipients with COVID-19 who required inpatient treatment at Johns Hopkins University hospitals from the beginning of the pandemic to March 2022, 23 patients developed invasive fungal infections (13 CAPA). Only a fraction – 38 of the 276 – had been intubated, he said.
 

Mucormycosis resistance

After CAPA, candidiasis and COVID-19-associated mucormycosis (CAM) – most frequently, rhino-orbital-cerebral disease or pulmonary disease – have been the leading reported fungal coinfections in COVID-19, said Dr. Hoenigl, who described the incidence, timeline, risk factors, and pathogenesis of these infections in a review published this year in Nature Microbiology. .

In India, where there has long been high exposure to Mucorales spores and a greater burden of invasive fungal disease, the rate of mucormycosis doubled in 2021, with rhino-orbital-cerebral disease reported almost exclusively, he said. Pulmonary disease has occurred almost exclusively in the ICU setting and has been present in about 50% of cases outside of India, including Europe and the United States.

A preprint meta-analysis of CAM cases posted by the Lancet in July 2022, in which investigators analyzed individual data of 556 reported cases of COVID-19–associated CAM, shows diabetes and history of corticosteroid use present in most patients, and an overall mortality rate of 44.4%, most of which stems from cases of pulmonary or disseminated disease. Thirteen of the 556 reported cases were from the United States.

An important take-away from the analysis, Dr. Hoenigl said, is that Aspergillus coinfection was seen in 7% of patients and was associated with higher mortality. “It’s important to consider that coinfections [of Aspergillus and Mucorales] can exist,” Dr. Hoenigl said, noting that like CAPA, pulmonary CAM is likely underdiagnosed and underreported.

As with CAPA, the clinical and radiological features of pulmonary CAM largely overlap with those associated with COVID-19, and bronchoscopy plays a central role in definitive diagnosis. In the United States, a Mucorales PCR test for blood and BAL fluid is commercially available and used at some centers, Dr. Hoenigl said.

“Mucormycosis is always difficult to treat ... a lot of the treatments don’t work particularly well,” said Dr. Thompson. “With aspergillosis, we have better treatment options.”

Dr. Thompson worries, however, about treatment resistance becoming widespread. Resistance to azole antifungal agents “is already pretty widespread in northern Europe, particularly in the Netherlands and part of the U.K.” because of injudicious use of antifungals in agriculture, he said. “We’ve started to see a few cases [of azole-resistant aspergillosis in the United States] and know it will be more widespread soon.”

Treatment resistance is a focus of the new WHO fungal priority pathogens list – the first such report from the organization. Of the 19 fungi on the list, 4 were ranked as critical: Cryptococcus neoformans, Candida auris, Aspergillus fumigatus, and Candida albicans. Like Dr. Thompson, Dr. Hoenigl contributed to the WHO report.

Dr. Hoenigl reported grant/research support from Astellas, Merck, F2G, Gilread, Pfizer, and Scynexis. Dr. Marr disclosed employment and equity in Pearl Diagnostics and Sfunga Therapeutics. Dr. Thompson, Dr. Permpalung, and Dr. Zeki reported that they have no relevant financial disclosures.
 

COVID-19 has lifted the lid on the risks of secondary pulmonary fungal infections in patients with severe respiratory viral illness – even previously immunocompetent individuals – and highlighted the importance of vigilant investigation to achieve early diagnoses, leading experts say.

Kathryn Kon/Science Photo Library/Getty Images

Most fungi are not under surveillance in the United States, leaving experts without a national picture of the true burden of infection through the pandemic. However, a collection of published case series, cohort studies, and reviews from Europe, the United States, and throughout the world – mainly pre-Omicron – show that fungal disease has affected a significant portion of critically ill patients with COVID-19, with concerning excess mortality, these experts say.

COVID-associated pulmonary aspergillosis (CAPA) has been the predominant fungal coinfection in the United States and internationally. But COVID-associated mucormycosis (CAM) – the infection that surged in India in early 2021 – has also affected some patients in the United States, published data show. So have Pneumocystitis pneumonia, cryptococcosis, histoplasmosis, and Candida infections (which mainly affect the bloodstream and abdomen), say the experts who were interviewed.

“We had predicted [a rise in] aspergillosis, but we saw more than we thought we’d see. Most fungal infections became more common with COVID-19,” said George Thompson, MD, professor of clinical medicine at the University of California, Davis, and cochair of the University of Alabama–based Mycoses Study Group Education Committee, a group of experts in medical mycology. Pneumocystitis, for instance, “has historically been associated with AIDS or different types of leukemia or lymphoma, and is not an infection we’ve typically seen in our otherwise healthy ICU patients,” he noted. “But we did see more of it [with COVID-19].”

More recently, with fewer patients during the Omicron phase in intensive care units with acute respiratory failure, the profile of fungal disease secondary to COVID-19 has changed. Increasing proportions of patients have traditional risk factors for aspergillosis, such as hematologic malignancies and longer-term, pre-COVID use of systemic corticosteroids – a change that makes the contribution of the viral illness harder to distinguish.

Moving forward, the lessons of the COVID era – the fungal risks to patients with serious viral infections and the persistence needed to diagnose aspergillosis and other pulmonary fungal infections using bronchoscopy and imperfect noninvasive tests – should be taken to heart, experts say.

“Fungal diseases are not rare. They’re just not diagnosed because no one thinks to look for them,” said Dr. Thompson, a contributor to a recently released World Health Organization report naming a “fungal priority pathogens” list.

“We’re going to continue to see [secondary fungal infections] with other respiratory viruses,” he said. And overall, given environmental and other changes, “we’re going to see more and more fungal disease in the patients we take care of.”


 

CAPA not a surprise

CAPA is “not an unfamiliar story” in the world of fungal disease, given a history of influenza-associated pulmonary aspergillosis (IAPA), said Kieren A. Marr, MD, MBA, adjunct professor of medicine and past director of the transplant and oncology infectious diseases program at Johns Hopkins University, Baltimore, who has long researched invasive fungal disease.

European researchers, she said, have led the way in describing a high incidence of IAPA in patients admitted to ICUs with influenza. In a retrospective multicenter cohort study reported in 2018 by the Dutch-Belgian Mycosis Study group, for instance, almost 20% of 432 influenza patients admitted to the ICU, including patients who were otherwise healthy and not immunocompromised, had the diagnosis a median of 3 days after ICU admission. (Across other cohort studies, rates of IAPA have ranged from 7% to 30%.)

Mortality was significant: 51% of patients with influenza and invasive pulmonary aspergillosis died within 90 days, compared with 28% of patients with influenza and no invasive pulmonary aspergillosis.

Reports from Europe early in the pandemic indicated that CAPA was a similarly serious problem, prompting establishment at Johns Hopkins University of an aggressive screening program utilizing biomarker-based testing of blood and bronchoalveolar lavage (BAL) fluid. Of 396 mechanically ventilated COVID-19 patients admitted to Johns Hopkins University hospitals between March and August 2020, 39 met the institution’s criteria for CAPA, Dr. Marr and her colleagues reported this year in what might be the largest U.S. cohort study of CAPA published to date.

“We now know definitively that people with severe influenza and with severe COVID also have high risks for both invasive and airway disease caused by airborne fungi, most commonly aspergilliosis,” Dr. Marr said.

More recent unpublished analyses of patients from the start of the pandemic to June 2021 show persistent risk, said Nitipong Permpalung, MD, MPH, assistant professor in transplant and oncology infectious diseases at Johns Hopkins University and lead author of the cohort study. Among 832 patients with COVID-19 who were mechanically ventilated in Johns Hopkins University hospitals, 11.8% had CAPA, he said. (Also, 3.2% had invasive candidiasis, and 1.1% had other invasive fungal infections.)

Other sources said in interviews that these CAPA prevalence rates generally mirror reports from Europe, though some investigators in Europe have reported CAPA rates more toward 15%.

(The Mycoses Study Group recently collected data from its consortium of U.S. medical centers on the prevalence of CAPA, with funding support from the CDC, but at press time the data had not yet been released. Dr. Thompson said he suspected the prevalence will be lower than earlier papers have suggested, “but still will reflect a significant burden of disease.”)

Patients in the published Johns Hopkins University study who had CAPA were more likely than those with COVID-19 but no CAPA to have underlying pulmonary disease, liver disease, coagulopathy, solid tumors, multiple myeloma, and COVID-19–directed corticosteroids. And they had uniformly worse outcomes with regards to severity of illness and length of intubation.

How much of CAPA is driven by the SARS-CoV-2 virus itself and how much is a consequence of COVID-19 treatments is a topic of active discussion and research. Martin Hoenigl, MD, of the University of Graz, Austria, a leading researcher in medical mycology, said research shows corticosteroids and anti–IL-6 treatments, such as tocilizumab, used to treat COVID-19–driven acute respiratory failure clearly have contributed to CAPA. But he contends that “a number of other mechanisms” are involved as well.

“The immunologic mechanisms are definitely different in these patients with viral illness than in other ICU patients [who develop aspergilliosis]. It’s not just the corticosteroids. The more we learn, we see the virus plays a role as well, suppressing the interferon pathway,” for example, said Dr. Hoenigl, associate professor in the division of infectious diseases and the European Confederation of Medical Mycology (ECMM) Center of Excellence at the university. The earliest reports of CAPA came “when ICUs weren’t using dexamethasone or tocilizumab,” he noted.

In a paper published recently in Lancet Respiratory Medicine that Dr. Hoenigl and others point to, Belgian researchers reported a “three-level breach” in innate antifungal immunity in both IAPA and CAPA, affecting the integrity of the epithelial barrier, the capacity to phagocytose and kill Aspergillus spores, and the ability to destroy Aspergillus hyphae, which is mainly mediated by neutrophils.

The researchers ran a host of genetic and protein analyses on lung samples (most collected via BAL) of 169 patients with influenza or COVID-19, with and without aspergillosis. They found that patients with CAPA had significantly lower neutrophil cell fractions than patients with COVID-19 only, and patients with IAPA or CAPA had reduced type II IFN signaling and increased concentrations of fibrosis-associated growth factors in the lower respiratory tracts (Lancet Respir Med. 2022 Aug 24).

Tom Chiller, MD, MPH, chief of the Center for Disease Control and Prevention’s Mycotic Disease Branch, said he’s watching such research with interest. For now, he said, it’s important to also consider that “data on COVID show that almost all patients going into the ICUs with pneumonia and COVID are getting broad-spectrum antibiotics” in addition to corticosteroids.

By wiping out good bacteria, the antibiotics could be “creating a perfect niche for fungi to grow,” he said.


 

Diagnostic challenges

Aspergillus that has invaded the lung tissue in patients with COVID-19 appears to grow there for some time – around 8-10 days, much longer than in IAPA – before becoming angioinvasive, said Dr. Hoenigl. Such a pathophysiology “implicates that we should try to diagnose it while it’s in the lung tissue, using the BAL fluid, and not yet in the blood,” he said.

Some multicenter studies, including one from Europe on Aspergillus test profiles in critically ill COVID-19 patients, have shown mortality rates of close to 90% in patients with CAPA who have positive serum biomarkers, despite appropriate antifungal therapy. “If diagnosed while confined to the lung, however, mortality rates are more like 40%-50% with antifungal therapy,” Dr. Hoenigl said. (Cohort studies published thus far have fairly consistently reported mortality rates in patients with CAPA greater than 40%, he said.)

Bronchoscopy isn’t always pragmatic or possible, however, and is variably used. Some patients with severe COVID-19 may be too unstable for any invasive procedure, said Dr. Permpalung.

Dr. Permpalung looks for CAPA using serum (1-3) beta-D-glucan (BDG, a generic fungal test not specific to Aspergillus), serum galactomannan (GM, specific for Aspergillus), and respiratory cultures (sputum or endotracheal aspirate if intubated) as initial screening tests in the ICU. If there are concerns for CAPA – based on these tests and/or the clinical picture – “a thoughtful risk-benefit discussion is required to determine if patients would benefit from a bronchoscopy or if we should just start them on empiric antifungal therapy.”

Unfortunately, the sensitivity of serum GM is relatively low in CAPA – lower than with classic invasive aspergillosis in the nonviral setting, sources said. BDG, on the other hand, can be falsely positive in the setting of antimicrobials and within the ICU. And the utility of imaging for CAPA is limited. Both the clinical picture and radiological findings of CAPA have resembled those of severe COVID – with the caveat of cavitary lung lesions visible on imaging.

“Cavities or nodules are a highly suspicious finding that could indicate possible fungal infection,” said pulmonologist Amir A. Zeki, MD, MAS, professor of medicine at the University of California, Davis, and codirector of the UC Davis Asthma Network Clinic, who has cared for patients with CAPA.

Cavitation has been described in only a proportion of patients with CAPA, however. So in patients not doing well, “your suspicion has to be raised if you’re not seeing cavities,” he said.

Early in the pandemic, when patients worsened or failed to progress on mechanical ventilation, clinicians at the University of California, Davis, quickly learned not to pin blame too quickly on COVID-19 alone. This remains good advice today, Dr. Zeki said.

“If you have a patient who’s not doing well on a ventilator, not getting better [over weeks], has to be reintubated, has infiltrates or lung nodules that are evolving, or certainly, if they have a cavity, you have to suspect fungal infection,” said Dr. Zeki, who also practices at the Veterans Affairs Medical Center in San Diego. “Think about it for those patients who just aren’t moving forward and are continuing to struggle. Have a high index of suspicion, and consult with your infectious disease colleagues.”

Empiric treatment is warranted in some cases if a patient is doing poorly and suspicion for fungal infection is high based on clinical, radiographic, and/or laboratory evidence, he said.

The CDC’s Dr. Chiller said that screening and diagnostic algorithms currently vary from institution to institution, and that diagnostic challenges likely dissuade clinicians from thinking about fungi. “Clinicians often don’t want to deal with fungi – they’re difficult to diagnose, the treatments are limited and can be toxic. But fungi get pushed back until it’s too late,” he said.

“Fungal diagnostics is an area we all need a lot more help with,” and new diagnostics are in the pipeline, he said. In the meantime, he said, “there are tools out there, and we just need to use them more, and improve how they’re used.”

While reported CAPA thus far has typically occurred in the setting of ICU care and mechanical ventilation, it’s not always the case, Dr. Permpalung said. Lung and other solid organ transplant (SOT) recipients with COVID-19 are developing CAPA and other invasive secondary invasive fungal infections despite not being intubated, he said.

Of 276 SOT recipients with COVID-19 who required inpatient treatment at Johns Hopkins University hospitals from the beginning of the pandemic to March 2022, 23 patients developed invasive fungal infections (13 CAPA). Only a fraction – 38 of the 276 – had been intubated, he said.
 

Mucormycosis resistance

After CAPA, candidiasis and COVID-19-associated mucormycosis (CAM) – most frequently, rhino-orbital-cerebral disease or pulmonary disease – have been the leading reported fungal coinfections in COVID-19, said Dr. Hoenigl, who described the incidence, timeline, risk factors, and pathogenesis of these infections in a review published this year in Nature Microbiology. .

In India, where there has long been high exposure to Mucorales spores and a greater burden of invasive fungal disease, the rate of mucormycosis doubled in 2021, with rhino-orbital-cerebral disease reported almost exclusively, he said. Pulmonary disease has occurred almost exclusively in the ICU setting and has been present in about 50% of cases outside of India, including Europe and the United States.

A preprint meta-analysis of CAM cases posted by the Lancet in July 2022, in which investigators analyzed individual data of 556 reported cases of COVID-19–associated CAM, shows diabetes and history of corticosteroid use present in most patients, and an overall mortality rate of 44.4%, most of which stems from cases of pulmonary or disseminated disease. Thirteen of the 556 reported cases were from the United States.

An important take-away from the analysis, Dr. Hoenigl said, is that Aspergillus coinfection was seen in 7% of patients and was associated with higher mortality. “It’s important to consider that coinfections [of Aspergillus and Mucorales] can exist,” Dr. Hoenigl said, noting that like CAPA, pulmonary CAM is likely underdiagnosed and underreported.

As with CAPA, the clinical and radiological features of pulmonary CAM largely overlap with those associated with COVID-19, and bronchoscopy plays a central role in definitive diagnosis. In the United States, a Mucorales PCR test for blood and BAL fluid is commercially available and used at some centers, Dr. Hoenigl said.

“Mucormycosis is always difficult to treat ... a lot of the treatments don’t work particularly well,” said Dr. Thompson. “With aspergillosis, we have better treatment options.”

Dr. Thompson worries, however, about treatment resistance becoming widespread. Resistance to azole antifungal agents “is already pretty widespread in northern Europe, particularly in the Netherlands and part of the U.K.” because of injudicious use of antifungals in agriculture, he said. “We’ve started to see a few cases [of azole-resistant aspergillosis in the United States] and know it will be more widespread soon.”

Treatment resistance is a focus of the new WHO fungal priority pathogens list – the first such report from the organization. Of the 19 fungi on the list, 4 were ranked as critical: Cryptococcus neoformans, Candida auris, Aspergillus fumigatus, and Candida albicans. Like Dr. Thompson, Dr. Hoenigl contributed to the WHO report.

Dr. Hoenigl reported grant/research support from Astellas, Merck, F2G, Gilread, Pfizer, and Scynexis. Dr. Marr disclosed employment and equity in Pearl Diagnostics and Sfunga Therapeutics. Dr. Thompson, Dr. Permpalung, and Dr. Zeki reported that they have no relevant financial disclosures.
 

COVID-19 has lifted the lid on the risks of secondary pulmonary fungal infections in patients with severe respiratory viral illness – even previously immunocompetent individuals – and highlighted the importance of vigilant investigation to achieve early diagnoses, leading experts say.

Kathryn Kon/Science Photo Library/Getty Images

Most fungi are not under surveillance in the United States, leaving experts without a national picture of the true burden of infection through the pandemic. However, a collection of published case series, cohort studies, and reviews from Europe, the United States, and throughout the world – mainly pre-Omicron – show that fungal disease has affected a significant portion of critically ill patients with COVID-19, with concerning excess mortality, these experts say.

COVID-associated pulmonary aspergillosis (CAPA) has been the predominant fungal coinfection in the United States and internationally. But COVID-associated mucormycosis (CAM) – the infection that surged in India in early 2021 – has also affected some patients in the United States, published data show. So have Pneumocystitis pneumonia, cryptococcosis, histoplasmosis, and Candida infections (which mainly affect the bloodstream and abdomen), say the experts who were interviewed.

“We had predicted [a rise in] aspergillosis, but we saw more than we thought we’d see. Most fungal infections became more common with COVID-19,” said George Thompson, MD, professor of clinical medicine at the University of California, Davis, and cochair of the University of Alabama–based Mycoses Study Group Education Committee, a group of experts in medical mycology. Pneumocystitis, for instance, “has historically been associated with AIDS or different types of leukemia or lymphoma, and is not an infection we’ve typically seen in our otherwise healthy ICU patients,” he noted. “But we did see more of it [with COVID-19].”

More recently, with fewer patients during the Omicron phase in intensive care units with acute respiratory failure, the profile of fungal disease secondary to COVID-19 has changed. Increasing proportions of patients have traditional risk factors for aspergillosis, such as hematologic malignancies and longer-term, pre-COVID use of systemic corticosteroids – a change that makes the contribution of the viral illness harder to distinguish.

Moving forward, the lessons of the COVID era – the fungal risks to patients with serious viral infections and the persistence needed to diagnose aspergillosis and other pulmonary fungal infections using bronchoscopy and imperfect noninvasive tests – should be taken to heart, experts say.

“Fungal diseases are not rare. They’re just not diagnosed because no one thinks to look for them,” said Dr. Thompson, a contributor to a recently released World Health Organization report naming a “fungal priority pathogens” list.

“We’re going to continue to see [secondary fungal infections] with other respiratory viruses,” he said. And overall, given environmental and other changes, “we’re going to see more and more fungal disease in the patients we take care of.”


 

CAPA not a surprise

CAPA is “not an unfamiliar story” in the world of fungal disease, given a history of influenza-associated pulmonary aspergillosis (IAPA), said Kieren A. Marr, MD, MBA, adjunct professor of medicine and past director of the transplant and oncology infectious diseases program at Johns Hopkins University, Baltimore, who has long researched invasive fungal disease.

European researchers, she said, have led the way in describing a high incidence of IAPA in patients admitted to ICUs with influenza. In a retrospective multicenter cohort study reported in 2018 by the Dutch-Belgian Mycosis Study group, for instance, almost 20% of 432 influenza patients admitted to the ICU, including patients who were otherwise healthy and not immunocompromised, had the diagnosis a median of 3 days after ICU admission. (Across other cohort studies, rates of IAPA have ranged from 7% to 30%.)

Mortality was significant: 51% of patients with influenza and invasive pulmonary aspergillosis died within 90 days, compared with 28% of patients with influenza and no invasive pulmonary aspergillosis.

Reports from Europe early in the pandemic indicated that CAPA was a similarly serious problem, prompting establishment at Johns Hopkins University of an aggressive screening program utilizing biomarker-based testing of blood and bronchoalveolar lavage (BAL) fluid. Of 396 mechanically ventilated COVID-19 patients admitted to Johns Hopkins University hospitals between March and August 2020, 39 met the institution’s criteria for CAPA, Dr. Marr and her colleagues reported this year in what might be the largest U.S. cohort study of CAPA published to date.

“We now know definitively that people with severe influenza and with severe COVID also have high risks for both invasive and airway disease caused by airborne fungi, most commonly aspergilliosis,” Dr. Marr said.

More recent unpublished analyses of patients from the start of the pandemic to June 2021 show persistent risk, said Nitipong Permpalung, MD, MPH, assistant professor in transplant and oncology infectious diseases at Johns Hopkins University and lead author of the cohort study. Among 832 patients with COVID-19 who were mechanically ventilated in Johns Hopkins University hospitals, 11.8% had CAPA, he said. (Also, 3.2% had invasive candidiasis, and 1.1% had other invasive fungal infections.)

Other sources said in interviews that these CAPA prevalence rates generally mirror reports from Europe, though some investigators in Europe have reported CAPA rates more toward 15%.

(The Mycoses Study Group recently collected data from its consortium of U.S. medical centers on the prevalence of CAPA, with funding support from the CDC, but at press time the data had not yet been released. Dr. Thompson said he suspected the prevalence will be lower than earlier papers have suggested, “but still will reflect a significant burden of disease.”)

Patients in the published Johns Hopkins University study who had CAPA were more likely than those with COVID-19 but no CAPA to have underlying pulmonary disease, liver disease, coagulopathy, solid tumors, multiple myeloma, and COVID-19–directed corticosteroids. And they had uniformly worse outcomes with regards to severity of illness and length of intubation.

How much of CAPA is driven by the SARS-CoV-2 virus itself and how much is a consequence of COVID-19 treatments is a topic of active discussion and research. Martin Hoenigl, MD, of the University of Graz, Austria, a leading researcher in medical mycology, said research shows corticosteroids and anti–IL-6 treatments, such as tocilizumab, used to treat COVID-19–driven acute respiratory failure clearly have contributed to CAPA. But he contends that “a number of other mechanisms” are involved as well.

“The immunologic mechanisms are definitely different in these patients with viral illness than in other ICU patients [who develop aspergilliosis]. It’s not just the corticosteroids. The more we learn, we see the virus plays a role as well, suppressing the interferon pathway,” for example, said Dr. Hoenigl, associate professor in the division of infectious diseases and the European Confederation of Medical Mycology (ECMM) Center of Excellence at the university. The earliest reports of CAPA came “when ICUs weren’t using dexamethasone or tocilizumab,” he noted.

In a paper published recently in Lancet Respiratory Medicine that Dr. Hoenigl and others point to, Belgian researchers reported a “three-level breach” in innate antifungal immunity in both IAPA and CAPA, affecting the integrity of the epithelial barrier, the capacity to phagocytose and kill Aspergillus spores, and the ability to destroy Aspergillus hyphae, which is mainly mediated by neutrophils.

The researchers ran a host of genetic and protein analyses on lung samples (most collected via BAL) of 169 patients with influenza or COVID-19, with and without aspergillosis. They found that patients with CAPA had significantly lower neutrophil cell fractions than patients with COVID-19 only, and patients with IAPA or CAPA had reduced type II IFN signaling and increased concentrations of fibrosis-associated growth factors in the lower respiratory tracts (Lancet Respir Med. 2022 Aug 24).

Tom Chiller, MD, MPH, chief of the Center for Disease Control and Prevention’s Mycotic Disease Branch, said he’s watching such research with interest. For now, he said, it’s important to also consider that “data on COVID show that almost all patients going into the ICUs with pneumonia and COVID are getting broad-spectrum antibiotics” in addition to corticosteroids.

By wiping out good bacteria, the antibiotics could be “creating a perfect niche for fungi to grow,” he said.


 

Diagnostic challenges

Aspergillus that has invaded the lung tissue in patients with COVID-19 appears to grow there for some time – around 8-10 days, much longer than in IAPA – before becoming angioinvasive, said Dr. Hoenigl. Such a pathophysiology “implicates that we should try to diagnose it while it’s in the lung tissue, using the BAL fluid, and not yet in the blood,” he said.

Some multicenter studies, including one from Europe on Aspergillus test profiles in critically ill COVID-19 patients, have shown mortality rates of close to 90% in patients with CAPA who have positive serum biomarkers, despite appropriate antifungal therapy. “If diagnosed while confined to the lung, however, mortality rates are more like 40%-50% with antifungal therapy,” Dr. Hoenigl said. (Cohort studies published thus far have fairly consistently reported mortality rates in patients with CAPA greater than 40%, he said.)

Bronchoscopy isn’t always pragmatic or possible, however, and is variably used. Some patients with severe COVID-19 may be too unstable for any invasive procedure, said Dr. Permpalung.

Dr. Permpalung looks for CAPA using serum (1-3) beta-D-glucan (BDG, a generic fungal test not specific to Aspergillus), serum galactomannan (GM, specific for Aspergillus), and respiratory cultures (sputum or endotracheal aspirate if intubated) as initial screening tests in the ICU. If there are concerns for CAPA – based on these tests and/or the clinical picture – “a thoughtful risk-benefit discussion is required to determine if patients would benefit from a bronchoscopy or if we should just start them on empiric antifungal therapy.”

Unfortunately, the sensitivity of serum GM is relatively low in CAPA – lower than with classic invasive aspergillosis in the nonviral setting, sources said. BDG, on the other hand, can be falsely positive in the setting of antimicrobials and within the ICU. And the utility of imaging for CAPA is limited. Both the clinical picture and radiological findings of CAPA have resembled those of severe COVID – with the caveat of cavitary lung lesions visible on imaging.

“Cavities or nodules are a highly suspicious finding that could indicate possible fungal infection,” said pulmonologist Amir A. Zeki, MD, MAS, professor of medicine at the University of California, Davis, and codirector of the UC Davis Asthma Network Clinic, who has cared for patients with CAPA.

Cavitation has been described in only a proportion of patients with CAPA, however. So in patients not doing well, “your suspicion has to be raised if you’re not seeing cavities,” he said.

Early in the pandemic, when patients worsened or failed to progress on mechanical ventilation, clinicians at the University of California, Davis, quickly learned not to pin blame too quickly on COVID-19 alone. This remains good advice today, Dr. Zeki said.

“If you have a patient who’s not doing well on a ventilator, not getting better [over weeks], has to be reintubated, has infiltrates or lung nodules that are evolving, or certainly, if they have a cavity, you have to suspect fungal infection,” said Dr. Zeki, who also practices at the Veterans Affairs Medical Center in San Diego. “Think about it for those patients who just aren’t moving forward and are continuing to struggle. Have a high index of suspicion, and consult with your infectious disease colleagues.”

Empiric treatment is warranted in some cases if a patient is doing poorly and suspicion for fungal infection is high based on clinical, radiographic, and/or laboratory evidence, he said.

The CDC’s Dr. Chiller said that screening and diagnostic algorithms currently vary from institution to institution, and that diagnostic challenges likely dissuade clinicians from thinking about fungi. “Clinicians often don’t want to deal with fungi – they’re difficult to diagnose, the treatments are limited and can be toxic. But fungi get pushed back until it’s too late,” he said.

“Fungal diagnostics is an area we all need a lot more help with,” and new diagnostics are in the pipeline, he said. In the meantime, he said, “there are tools out there, and we just need to use them more, and improve how they’re used.”

While reported CAPA thus far has typically occurred in the setting of ICU care and mechanical ventilation, it’s not always the case, Dr. Permpalung said. Lung and other solid organ transplant (SOT) recipients with COVID-19 are developing CAPA and other invasive secondary invasive fungal infections despite not being intubated, he said.

Of 276 SOT recipients with COVID-19 who required inpatient treatment at Johns Hopkins University hospitals from the beginning of the pandemic to March 2022, 23 patients developed invasive fungal infections (13 CAPA). Only a fraction – 38 of the 276 – had been intubated, he said.
 

Mucormycosis resistance

After CAPA, candidiasis and COVID-19-associated mucormycosis (CAM) – most frequently, rhino-orbital-cerebral disease or pulmonary disease – have been the leading reported fungal coinfections in COVID-19, said Dr. Hoenigl, who described the incidence, timeline, risk factors, and pathogenesis of these infections in a review published this year in Nature Microbiology. .

In India, where there has long been high exposure to Mucorales spores and a greater burden of invasive fungal disease, the rate of mucormycosis doubled in 2021, with rhino-orbital-cerebral disease reported almost exclusively, he said. Pulmonary disease has occurred almost exclusively in the ICU setting and has been present in about 50% of cases outside of India, including Europe and the United States.

A preprint meta-analysis of CAM cases posted by the Lancet in July 2022, in which investigators analyzed individual data of 556 reported cases of COVID-19–associated CAM, shows diabetes and history of corticosteroid use present in most patients, and an overall mortality rate of 44.4%, most of which stems from cases of pulmonary or disseminated disease. Thirteen of the 556 reported cases were from the United States.

An important take-away from the analysis, Dr. Hoenigl said, is that Aspergillus coinfection was seen in 7% of patients and was associated with higher mortality. “It’s important to consider that coinfections [of Aspergillus and Mucorales] can exist,” Dr. Hoenigl said, noting that like CAPA, pulmonary CAM is likely underdiagnosed and underreported.

As with CAPA, the clinical and radiological features of pulmonary CAM largely overlap with those associated with COVID-19, and bronchoscopy plays a central role in definitive diagnosis. In the United States, a Mucorales PCR test for blood and BAL fluid is commercially available and used at some centers, Dr. Hoenigl said.

“Mucormycosis is always difficult to treat ... a lot of the treatments don’t work particularly well,” said Dr. Thompson. “With aspergillosis, we have better treatment options.”

Dr. Thompson worries, however, about treatment resistance becoming widespread. Resistance to azole antifungal agents “is already pretty widespread in northern Europe, particularly in the Netherlands and part of the U.K.” because of injudicious use of antifungals in agriculture, he said. “We’ve started to see a few cases [of azole-resistant aspergillosis in the United States] and know it will be more widespread soon.”

Treatment resistance is a focus of the new WHO fungal priority pathogens list – the first such report from the organization. Of the 19 fungi on the list, 4 were ranked as critical: Cryptococcus neoformans, Candida auris, Aspergillus fumigatus, and Candida albicans. Like Dr. Thompson, Dr. Hoenigl contributed to the WHO report.

Dr. Hoenigl reported grant/research support from Astellas, Merck, F2G, Gilread, Pfizer, and Scynexis. Dr. Marr disclosed employment and equity in Pearl Diagnostics and Sfunga Therapeutics. Dr. Thompson, Dr. Permpalung, and Dr. Zeki reported that they have no relevant financial disclosures.
 

Welcome to Impact Factor, your weekly dose of commentary on a new medical study. I’m Dr F. Perry Wilson of the Yale School of Medicine.

As soon as the pandemic started, the search was on for a medication that could stave off infection, or at least the worst consequences of infection.

One that would be cheap to make, safe, easy to distribute, and, ideally, was already available. The search had a quest-like quality, like something from a fairy tale. Society, poisoned by COVID, would find the antidote out there, somewhere, if we looked hard enough.

You know the story. There were some pretty dramatic failures: hydroxychloroquine, ivermectin. There were some successes, like dexamethasone.

I’m not here today to tell you that the antidote has been found – no, it takes large randomized trials to figure that out. But I do want to tell you about a paper that, unlike so many that came before, lays out the argument for a potential COVID preventive so thoroughly and so rigorously, that it has convinced me that this little drug, ursodeoxycholic acid (UDCA) – you may know it as Actigall, used for an uncommon form of liver disease – may actually be useful to prevent COVID infection.

How do you make a case that an existing drug – UDCA, in this case – might be useful to prevent or treat COVID? In contrast to prior basic-science studies, like the original ivermectin study, which essentially took a bunch of cells and virus in a tube filled with varying concentrations of the antiparasitic agent, the authors of this paper appearing in Nature give us multiple, complementary lines of evidence. Let me walk you through it.

All good science starts with a biologically plausible hypothesis. In this case, the authors recognized that SARS-CoV-2, in all its variants, requires the presence of the ACE2 receptor on the surface of cells to bind.

Courtesy Innovative Genomics

Courtesy Nature

Courtesy Nature

Courtesy Nature

Courtesy Nature

Courtesy Dr. F. Perry Wilson

courtesy Nature

Courtesy Nature

F. Perry Wilson, MD, MSCE, is an associate professor of medicine and director of Yale’s Clinical and Translational Research Accelerator. He disclosed no relevant financial relationships.

A version of this video transcript first appeared on Medscape.com.

Welcome to Impact Factor, your weekly dose of commentary on a new medical study. I’m Dr F. Perry Wilson of the Yale School of Medicine.

As soon as the pandemic started, the search was on for a medication that could stave off infection, or at least the worst consequences of infection.

One that would be cheap to make, safe, easy to distribute, and, ideally, was already available. The search had a quest-like quality, like something from a fairy tale. Society, poisoned by COVID, would find the antidote out there, somewhere, if we looked hard enough.

You know the story. There were some pretty dramatic failures: hydroxychloroquine, ivermectin. There were some successes, like dexamethasone.

I’m not here today to tell you that the antidote has been found – no, it takes large randomized trials to figure that out. But I do want to tell you about a paper that, unlike so many that came before, lays out the argument for a potential COVID preventive so thoroughly and so rigorously, that it has convinced me that this little drug, ursodeoxycholic acid (UDCA) – you may know it as Actigall, used for an uncommon form of liver disease – may actually be useful to prevent COVID infection.

How do you make a case that an existing drug – UDCA, in this case – might be useful to prevent or treat COVID? In contrast to prior basic-science studies, like the original ivermectin study, which essentially took a bunch of cells and virus in a tube filled with varying concentrations of the antiparasitic agent, the authors of this paper appearing in Nature give us multiple, complementary lines of evidence. Let me walk you through it.

All good science starts with a biologically plausible hypothesis. In this case, the authors recognized that SARS-CoV-2, in all its variants, requires the presence of the ACE2 receptor on the surface of cells to bind.

Courtesy Innovative Genomics

Courtesy Nature

Courtesy Nature

Courtesy Nature

Courtesy Nature

Courtesy Dr. F. Perry Wilson

courtesy Nature

Courtesy Nature

F. Perry Wilson, MD, MSCE, is an associate professor of medicine and director of Yale’s Clinical and Translational Research Accelerator. He disclosed no relevant financial relationships.

A version of this video transcript first appeared on Medscape.com.

Welcome to Impact Factor, your weekly dose of commentary on a new medical study. I’m Dr F. Perry Wilson of the Yale School of Medicine.

As soon as the pandemic started, the search was on for a medication that could stave off infection, or at least the worst consequences of infection.

One that would be cheap to make, safe, easy to distribute, and, ideally, was already available. The search had a quest-like quality, like something from a fairy tale. Society, poisoned by COVID, would find the antidote out there, somewhere, if we looked hard enough.

You know the story. There were some pretty dramatic failures: hydroxychloroquine, ivermectin. There were some successes, like dexamethasone.

I’m not here today to tell you that the antidote has been found – no, it takes large randomized trials to figure that out. But I do want to tell you about a paper that, unlike so many that came before, lays out the argument for a potential COVID preventive so thoroughly and so rigorously, that it has convinced me that this little drug, ursodeoxycholic acid (UDCA) – you may know it as Actigall, used for an uncommon form of liver disease – may actually be useful to prevent COVID infection.

How do you make a case that an existing drug – UDCA, in this case – might be useful to prevent or treat COVID? In contrast to prior basic-science studies, like the original ivermectin study, which essentially took a bunch of cells and virus in a tube filled with varying concentrations of the antiparasitic agent, the authors of this paper appearing in Nature give us multiple, complementary lines of evidence. Let me walk you through it.

All good science starts with a biologically plausible hypothesis. In this case, the authors recognized that SARS-CoV-2, in all its variants, requires the presence of the ACE2 receptor on the surface of cells to bind.

Courtesy Innovative Genomics

Courtesy Nature

Courtesy Nature

Courtesy Nature

Courtesy Nature

Courtesy Dr. F. Perry Wilson

courtesy Nature

Courtesy Nature

F. Perry Wilson, MD, MSCE, is an associate professor of medicine and director of Yale’s Clinical and Translational Research Accelerator. He disclosed no relevant financial relationships.

A version of this video transcript first appeared on Medscape.com.

Nearly 6 million Americans have taken Paxlovid for free, courtesy of the federal government. The Pfizer pill has helped prevent many people infected with COVID-19 from being hospitalized or dying, and it may even reduce the risk of developing long COVID. But the government plans to stop footing the bill within months, and millions of people who are at the highest risk of severe illness and are least able to afford the drug – the uninsured and seniors – may have to pay the full price.

And that means fewer people will get the potentially lifesaving treatments, experts said.

“I think the numbers will go way down,” said Jill Rosenthal, director of public health policy at the Center for American Progress, a left-leaning think tank. A bill for several hundred dollars or more would lead many people to decide the medication isn’t worth the price, she said.

In response to the unprecedented public health crisis caused by COVID, the federal government spent billions of dollars on developing new vaccines and treatments, to swift success: Less than a year after the pandemic was declared, medical workers got their first vaccines. But as many people have refused the shots and stopped wearing masks, the virus still rages and mutates. In 2022 alone, 250,000 Americans have died from COVID, more than from strokes or diabetes.

But soon the Department of Health & Human Services will stop supplying COVID treatments, and pharmacies will purchase and bill for them the same way they do for antibiotic pills or asthma inhalers. Paxlovid is expected to hit the private market in mid-2023, according to HHS plans shared in an October meeting with state health officials and clinicians. Merck’s Lagevrio, a less-effective COVID treatment pill, and AstraZeneca’s Evusheld, a preventive therapy for the immunocompromised, are on track to be commercialized sooner, sometime in the winter.

The U.S. government has so far purchased 20 million courses of Paxlovid, priced at about $530 each, a discount for buying in bulk that Pfizer CEO Albert Bourla called “really very attractive” to the federal government in a July earnings call. The drug will cost far more on the private market, although in a statement to Kaiser Health News, Pfizer declined to share the planned price. The government will also stop paying for the company’s COVID vaccine next year – those shots will quadruple in price, from the discount rate the government pays of $30 to about $120.

Mr. Bourla told investors in November that he expects the move will make Paxlovid and its COVID vaccine “a multibillion-dollars franchise.”

Nearly 9 in 10 people dying from the virus now are 65 or older. Yet federal law restricts Medicare Part D – the prescription drug program that covers nearly 50 million seniors – from covering the COVID treatment pills. The medications are meant for those most at risk of serious illness, including seniors.

Paxlovid and the other treatments are currently available under an emergency use authorization from the FDA, a fast-track review used in extraordinary situations. Although Pfizer applied for full approval in June, the process can take anywhere from several months to years. And Medicare Part D can’t cover any medications without that full stamp of approval.

Paying out-of-pocket would be “a substantial barrier” for seniors on Medicare – the very people who would benefit most from the drug, wrote federal health experts.

“From a public health perspective, and even from a health care capacity and cost perspective, it would just defy reason to not continue to make these drugs readily available,” said Dr. Larry Madoff, medical director of Massachusetts’s Bureau of Infectious Disease and Laboratory Sciences. He’s hopeful that the federal health agency will find a way to set aside unused doses for seniors and people without insurance.

In mid-November, the White House requested that Congress approve an additional $2.5 billion for COVID therapeutics and vaccines to make sure people can afford the medications when they’re no longer free. But there’s little hope it will be approved – the Senate voted that same day to end the public health emergency and denied similar requests in recent months.

Many Americans have already faced hurdles just getting a prescription for COVID treatment. Although the federal government doesn’t track who’s gotten the drug, a Centers for Disease Control and Prevention study using data from 30 medical centers found that Black and Hispanic patients with COVID were much less likely to receive Paxlovid than White patients. (Hispanic people can be of any race or combination of races.) And when the government is no longer picking up the tab, experts predict that these gaps by race, income, and geography will widen.

People in Northeastern states used the drug far more often than those in the rest of the country, according to a KHN analysis of Paxlovid use in September and October. But it wasn’t because people in the region were getting sick from COVID at much higher rates – instead, many of those states offered better access to health care to begin with and created special programs to get Paxlovid to their residents.

About 10 mostly Democratic states and several large counties in the Northeast and elsewhere created free “test-to-treat” programs that allow their residents to get an immediate doctor visit and prescription for treatment after testing positive for COVID. In Massachusetts, more than 20,000 residents have used the state’s video and phone hotline, which is available 7 days a week in 13 languages. Massachusetts, which has the highest insurance rate in the country and relatively low travel times to pharmacies, had the second-highest Paxlovid usage rate among states this fall.

States with higher COVID death rates, like Florida and Kentucky, where residents must travel farther for health care and are more likely to be uninsured, used the drug less often. Without no-cost test-to-treat options, residents have struggled to get prescriptions even though the drug itself is still free.

“If you look at access to medications for people who are uninsured, I think that there’s no question that will widen those disparities,” Ms. Rosenthal said.

People who get insurance through their jobs could face high copays at the register, too, just as they do for insulin and other expensive or brand-name drugs.

Most private insurance companies will end up covering COVID therapeutics to some extent, said Sabrina Corlette, a research professor at Georgetown University’s Center on Health Insurance Reforms. After all, the pills are cheaper than a hospital stay. But for most people who get insurance through their jobs, there are “really no rules at all,” she said. Some insurers could take months to add the drugs to their plans or decide not to pay for them.

And the additional cost means many people will go without the medication. “We know from lots of research that when people face cost sharing for these drugs that they need to take, they will often forgo or cut back,” Ms. Corlette said.

One group doesn’t need to worry about sticker shock. Medicaid, the public insurance program for low-income adults and children, will cover the treatments in full until at least early 2024.

HHS officials could set aside any leftover taxpayer-funded medication for people who can’t afford to pay the full cost, but they haven’t shared any concrete plans to do so. The government purchased 20 million courses of Paxlovid and 3 million of Lagevrio. Fewer than a third have been used, and usage has fallen in recent months, according to KHN’s analysis of the data from HHS.

Sixty percent of the government’s supply of Evusheld is also still available, although the COVID prevention therapy is less effective against new strains of the virus. The health department in one state, New Mexico, has recommended against using it.

HHS did not make officials available for an interview or answer written questions about the commercialization plans.

The government created a potential workaround when they moved bebtelovimab, another COVID treatment, to the private market this summer. It now retails for $2,100 per patient. The agency set aside the remaining 60,000 government-purchased doses that hospitals could use to treat uninsured patients in a convoluted dose-replacement process. But it’s hard to tell how well that setup would work for Paxlovid: Bebtelovimab was already much less popular, and the FDA halted its use on Nov. 30 because it’s less effective against current strains of the virus.

Federal officials and insurance companies would have good reason to make sure patients can continue to afford COVID drugs: They’re far cheaper than if patients land in the emergency room.

“The medications are so worthwhile,” said Dr. Madoff, the Massachusetts health official. “They’re not expensive in the grand scheme of health care costs.”

KHN (Kaiser Health News) is a national newsroom that produces in-depth journalism about health issues. Together with Policy Analysis and Polling, KHN is one of the three major operating programs at KFF (Kaiser Family Foundation). KFF is an endowed nonprofit organization providing information on health issues to the nation.

Nearly 6 million Americans have taken Paxlovid for free, courtesy of the federal government. The Pfizer pill has helped prevent many people infected with COVID-19 from being hospitalized or dying, and it may even reduce the risk of developing long COVID. But the government plans to stop footing the bill within months, and millions of people who are at the highest risk of severe illness and are least able to afford the drug – the uninsured and seniors – may have to pay the full price.

And that means fewer people will get the potentially lifesaving treatments, experts said.

“I think the numbers will go way down,” said Jill Rosenthal, director of public health policy at the Center for American Progress, a left-leaning think tank. A bill for several hundred dollars or more would lead many people to decide the medication isn’t worth the price, she said.

In response to the unprecedented public health crisis caused by COVID, the federal government spent billions of dollars on developing new vaccines and treatments, to swift success: Less than a year after the pandemic was declared, medical workers got their first vaccines. But as many people have refused the shots and stopped wearing masks, the virus still rages and mutates. In 2022 alone, 250,000 Americans have died from COVID, more than from strokes or diabetes.

But soon the Department of Health & Human Services will stop supplying COVID treatments, and pharmacies will purchase and bill for them the same way they do for antibiotic pills or asthma inhalers. Paxlovid is expected to hit the private market in mid-2023, according to HHS plans shared in an October meeting with state health officials and clinicians. Merck’s Lagevrio, a less-effective COVID treatment pill, and AstraZeneca’s Evusheld, a preventive therapy for the immunocompromised, are on track to be commercialized sooner, sometime in the winter.

The U.S. government has so far purchased 20 million courses of Paxlovid, priced at about $530 each, a discount for buying in bulk that Pfizer CEO Albert Bourla called “really very attractive” to the federal government in a July earnings call. The drug will cost far more on the private market, although in a statement to Kaiser Health News, Pfizer declined to share the planned price. The government will also stop paying for the company’s COVID vaccine next year – those shots will quadruple in price, from the discount rate the government pays of $30 to about $120.

Mr. Bourla told investors in November that he expects the move will make Paxlovid and its COVID vaccine “a multibillion-dollars franchise.”

Nearly 9 in 10 people dying from the virus now are 65 or older. Yet federal law restricts Medicare Part D – the prescription drug program that covers nearly 50 million seniors – from covering the COVID treatment pills. The medications are meant for those most at risk of serious illness, including seniors.

Paxlovid and the other treatments are currently available under an emergency use authorization from the FDA, a fast-track review used in extraordinary situations. Although Pfizer applied for full approval in June, the process can take anywhere from several months to years. And Medicare Part D can’t cover any medications without that full stamp of approval.

Paying out-of-pocket would be “a substantial barrier” for seniors on Medicare – the very people who would benefit most from the drug, wrote federal health experts.

“From a public health perspective, and even from a health care capacity and cost perspective, it would just defy reason to not continue to make these drugs readily available,” said Dr. Larry Madoff, medical director of Massachusetts’s Bureau of Infectious Disease and Laboratory Sciences. He’s hopeful that the federal health agency will find a way to set aside unused doses for seniors and people without insurance.

In mid-November, the White House requested that Congress approve an additional $2.5 billion for COVID therapeutics and vaccines to make sure people can afford the medications when they’re no longer free. But there’s little hope it will be approved – the Senate voted that same day to end the public health emergency and denied similar requests in recent months.

Many Americans have already faced hurdles just getting a prescription for COVID treatment. Although the federal government doesn’t track who’s gotten the drug, a Centers for Disease Control and Prevention study using data from 30 medical centers found that Black and Hispanic patients with COVID were much less likely to receive Paxlovid than White patients. (Hispanic people can be of any race or combination of races.) And when the government is no longer picking up the tab, experts predict that these gaps by race, income, and geography will widen.

People in Northeastern states used the drug far more often than those in the rest of the country, according to a KHN analysis of Paxlovid use in September and October. But it wasn’t because people in the region were getting sick from COVID at much higher rates – instead, many of those states offered better access to health care to begin with and created special programs to get Paxlovid to their residents.

About 10 mostly Democratic states and several large counties in the Northeast and elsewhere created free “test-to-treat” programs that allow their residents to get an immediate doctor visit and prescription for treatment after testing positive for COVID. In Massachusetts, more than 20,000 residents have used the state’s video and phone hotline, which is available 7 days a week in 13 languages. Massachusetts, which has the highest insurance rate in the country and relatively low travel times to pharmacies, had the second-highest Paxlovid usage rate among states this fall.

States with higher COVID death rates, like Florida and Kentucky, where residents must travel farther for health care and are more likely to be uninsured, used the drug less often. Without no-cost test-to-treat options, residents have struggled to get prescriptions even though the drug itself is still free.

“If you look at access to medications for people who are uninsured, I think that there’s no question that will widen those disparities,” Ms. Rosenthal said.

People who get insurance through their jobs could face high copays at the register, too, just as they do for insulin and other expensive or brand-name drugs.

Most private insurance companies will end up covering COVID therapeutics to some extent, said Sabrina Corlette, a research professor at Georgetown University’s Center on Health Insurance Reforms. After all, the pills are cheaper than a hospital stay. But for most people who get insurance through their jobs, there are “really no rules at all,” she said. Some insurers could take months to add the drugs to their plans or decide not to pay for them.

And the additional cost means many people will go without the medication. “We know from lots of research that when people face cost sharing for these drugs that they need to take, they will often forgo or cut back,” Ms. Corlette said.

One group doesn’t need to worry about sticker shock. Medicaid, the public insurance program for low-income adults and children, will cover the treatments in full until at least early 2024.

HHS officials could set aside any leftover taxpayer-funded medication for people who can’t afford to pay the full cost, but they haven’t shared any concrete plans to do so. The government purchased 20 million courses of Paxlovid and 3 million of Lagevrio. Fewer than a third have been used, and usage has fallen in recent months, according to KHN’s analysis of the data from HHS.

Sixty percent of the government’s supply of Evusheld is also still available, although the COVID prevention therapy is less effective against new strains of the virus. The health department in one state, New Mexico, has recommended against using it.

HHS did not make officials available for an interview or answer written questions about the commercialization plans.

The government created a potential workaround when they moved bebtelovimab, another COVID treatment, to the private market this summer. It now retails for $2,100 per patient. The agency set aside the remaining 60,000 government-purchased doses that hospitals could use to treat uninsured patients in a convoluted dose-replacement process. But it’s hard to tell how well that setup would work for Paxlovid: Bebtelovimab was already much less popular, and the FDA halted its use on Nov. 30 because it’s less effective against current strains of the virus.

Federal officials and insurance companies would have good reason to make sure patients can continue to afford COVID drugs: They’re far cheaper than if patients land in the emergency room.

“The medications are so worthwhile,” said Dr. Madoff, the Massachusetts health official. “They’re not expensive in the grand scheme of health care costs.”

KHN (Kaiser Health News) is a national newsroom that produces in-depth journalism about health issues. Together with Policy Analysis and Polling, KHN is one of the three major operating programs at KFF (Kaiser Family Foundation). KFF is an endowed nonprofit organization providing information on health issues to the nation.

Nearly 6 million Americans have taken Paxlovid for free, courtesy of the federal government. The Pfizer pill has helped prevent many people infected with COVID-19 from being hospitalized or dying, and it may even reduce the risk of developing long COVID. But the government plans to stop footing the bill within months, and millions of people who are at the highest risk of severe illness and are least able to afford the drug – the uninsured and seniors – may have to pay the full price.

And that means fewer people will get the potentially lifesaving treatments, experts said.

“I think the numbers will go way down,” said Jill Rosenthal, director of public health policy at the Center for American Progress, a left-leaning think tank. A bill for several hundred dollars or more would lead many people to decide the medication isn’t worth the price, she said.

In response to the unprecedented public health crisis caused by COVID, the federal government spent billions of dollars on developing new vaccines and treatments, to swift success: Less than a year after the pandemic was declared, medical workers got their first vaccines. But as many people have refused the shots and stopped wearing masks, the virus still rages and mutates. In 2022 alone, 250,000 Americans have died from COVID, more than from strokes or diabetes.

But soon the Department of Health & Human Services will stop supplying COVID treatments, and pharmacies will purchase and bill for them the same way they do for antibiotic pills or asthma inhalers. Paxlovid is expected to hit the private market in mid-2023, according to HHS plans shared in an October meeting with state health officials and clinicians. Merck’s Lagevrio, a less-effective COVID treatment pill, and AstraZeneca’s Evusheld, a preventive therapy for the immunocompromised, are on track to be commercialized sooner, sometime in the winter.

The U.S. government has so far purchased 20 million courses of Paxlovid, priced at about $530 each, a discount for buying in bulk that Pfizer CEO Albert Bourla called “really very attractive” to the federal government in a July earnings call. The drug will cost far more on the private market, although in a statement to Kaiser Health News, Pfizer declined to share the planned price. The government will also stop paying for the company’s COVID vaccine next year – those shots will quadruple in price, from the discount rate the government pays of $30 to about $120.

Mr. Bourla told investors in November that he expects the move will make Paxlovid and its COVID vaccine “a multibillion-dollars franchise.”

Nearly 9 in 10 people dying from the virus now are 65 or older. Yet federal law restricts Medicare Part D – the prescription drug program that covers nearly 50 million seniors – from covering the COVID treatment pills. The medications are meant for those most at risk of serious illness, including seniors.

Paxlovid and the other treatments are currently available under an emergency use authorization from the FDA, a fast-track review used in extraordinary situations. Although Pfizer applied for full approval in June, the process can take anywhere from several months to years. And Medicare Part D can’t cover any medications without that full stamp of approval.

Paying out-of-pocket would be “a substantial barrier” for seniors on Medicare – the very people who would benefit most from the drug, wrote federal health experts.

“From a public health perspective, and even from a health care capacity and cost perspective, it would just defy reason to not continue to make these drugs readily available,” said Dr. Larry Madoff, medical director of Massachusetts’s Bureau of Infectious Disease and Laboratory Sciences. He’s hopeful that the federal health agency will find a way to set aside unused doses for seniors and people without insurance.

In mid-November, the White House requested that Congress approve an additional $2.5 billion for COVID therapeutics and vaccines to make sure people can afford the medications when they’re no longer free. But there’s little hope it will be approved – the Senate voted that same day to end the public health emergency and denied similar requests in recent months.

Many Americans have already faced hurdles just getting a prescription for COVID treatment. Although the federal government doesn’t track who’s gotten the drug, a Centers for Disease Control and Prevention study using data from 30 medical centers found that Black and Hispanic patients with COVID were much less likely to receive Paxlovid than White patients. (Hispanic people can be of any race or combination of races.) And when the government is no longer picking up the tab, experts predict that these gaps by race, income, and geography will widen.

People in Northeastern states used the drug far more often than those in the rest of the country, according to a KHN analysis of Paxlovid use in September and October. But it wasn’t because people in the region were getting sick from COVID at much higher rates – instead, many of those states offered better access to health care to begin with and created special programs to get Paxlovid to their residents.

About 10 mostly Democratic states and several large counties in the Northeast and elsewhere created free “test-to-treat” programs that allow their residents to get an immediate doctor visit and prescription for treatment after testing positive for COVID. In Massachusetts, more than 20,000 residents have used the state’s video and phone hotline, which is available 7 days a week in 13 languages. Massachusetts, which has the highest insurance rate in the country and relatively low travel times to pharmacies, had the second-highest Paxlovid usage rate among states this fall.

States with higher COVID death rates, like Florida and Kentucky, where residents must travel farther for health care and are more likely to be uninsured, used the drug less often. Without no-cost test-to-treat options, residents have struggled to get prescriptions even though the drug itself is still free.

“If you look at access to medications for people who are uninsured, I think that there’s no question that will widen those disparities,” Ms. Rosenthal said.

People who get insurance through their jobs could face high copays at the register, too, just as they do for insulin and other expensive or brand-name drugs.

Most private insurance companies will end up covering COVID therapeutics to some extent, said Sabrina Corlette, a research professor at Georgetown University’s Center on Health Insurance Reforms. After all, the pills are cheaper than a hospital stay. But for most people who get insurance through their jobs, there are “really no rules at all,” she said. Some insurers could take months to add the drugs to their plans or decide not to pay for them.

And the additional cost means many people will go without the medication. “We know from lots of research that when people face cost sharing for these drugs that they need to take, they will often forgo or cut back,” Ms. Corlette said.

One group doesn’t need to worry about sticker shock. Medicaid, the public insurance program for low-income adults and children, will cover the treatments in full until at least early 2024.

HHS officials could set aside any leftover taxpayer-funded medication for people who can’t afford to pay the full cost, but they haven’t shared any concrete plans to do so. The government purchased 20 million courses of Paxlovid and 3 million of Lagevrio. Fewer than a third have been used, and usage has fallen in recent months, according to KHN’s analysis of the data from HHS.

Sixty percent of the government’s supply of Evusheld is also still available, although the COVID prevention therapy is less effective against new strains of the virus. The health department in one state, New Mexico, has recommended against using it.

HHS did not make officials available for an interview or answer written questions about the commercialization plans.

The government created a potential workaround when they moved bebtelovimab, another COVID treatment, to the private market this summer. It now retails for $2,100 per patient. The agency set aside the remaining 60,000 government-purchased doses that hospitals could use to treat uninsured patients in a convoluted dose-replacement process. But it’s hard to tell how well that setup would work for Paxlovid: Bebtelovimab was already much less popular, and the FDA halted its use on Nov. 30 because it’s less effective against current strains of the virus.

Federal officials and insurance companies would have good reason to make sure patients can continue to afford COVID drugs: They’re far cheaper than if patients land in the emergency room.

“The medications are so worthwhile,” said Dr. Madoff, the Massachusetts health official. “They’re not expensive in the grand scheme of health care costs.”

KHN (Kaiser Health News) is a national newsroom that produces in-depth journalism about health issues. Together with Policy Analysis and Polling, KHN is one of the three major operating programs at KFF (Kaiser Family Foundation). KFF is an endowed nonprofit organization providing information on health issues to the nation.

Soil-dwelling fungi that can cause lung infections are more widespread than most doctors thought, sometimes leading to missed diagnoses, according to a new study. 

Researchers studying fungi-linked lung infections realized that many infections were occurring in places the fungi weren’t thought to exist. They found that maps doctors use to know if the fungi are a threat in their area hadn’t been updated in half a century.

“Recently, we are finding more cases of these diseases outside their known areas, taking clinicians and patients by surprise,” University of California, Davis infectious disease professor George Thompson, MD, said in a commentary published along with the study.

Published in the journal Clinical Infectious Diseases, the study sought to identify illnesses linked to three types of soil fungi in the United States that are known to cause lung infections. They are called histoplasma, blastomyces, and coccidioides, the latter of which causes an illness known as Valley fever, which has been on the rise in California.

Researchers used data for more than 45 million people who use Medicare and found that at least 1 of these 3 fungi are present in 48 of 50 U.S. states and Washington, D.C.

Symptoms after breathing in the fungi spores include fever and cough and can be similar to symptoms of other illnesses, according to the Centers for Disease Control.

The researchers said health care providers need to increase their suspicion for these fungi, which “would likely result in fewer missed diagnoses, fewer diagnostic delays, and improved patient outcomes.”

A version of this article first appeared on WebMD.com.

Soil-dwelling fungi that can cause lung infections are more widespread than most doctors thought, sometimes leading to missed diagnoses, according to a new study. 

Researchers studying fungi-linked lung infections realized that many infections were occurring in places the fungi weren’t thought to exist. They found that maps doctors use to know if the fungi are a threat in their area hadn’t been updated in half a century.

“Recently, we are finding more cases of these diseases outside their known areas, taking clinicians and patients by surprise,” University of California, Davis infectious disease professor George Thompson, MD, said in a commentary published along with the study.

Published in the journal Clinical Infectious Diseases, the study sought to identify illnesses linked to three types of soil fungi in the United States that are known to cause lung infections. They are called histoplasma, blastomyces, and coccidioides, the latter of which causes an illness known as Valley fever, which has been on the rise in California.

Researchers used data for more than 45 million people who use Medicare and found that at least 1 of these 3 fungi are present in 48 of 50 U.S. states and Washington, D.C.

Symptoms after breathing in the fungi spores include fever and cough and can be similar to symptoms of other illnesses, according to the Centers for Disease Control.

The researchers said health care providers need to increase their suspicion for these fungi, which “would likely result in fewer missed diagnoses, fewer diagnostic delays, and improved patient outcomes.”

A version of this article first appeared on WebMD.com.

Soil-dwelling fungi that can cause lung infections are more widespread than most doctors thought, sometimes leading to missed diagnoses, according to a new study. 

Researchers studying fungi-linked lung infections realized that many infections were occurring in places the fungi weren’t thought to exist. They found that maps doctors use to know if the fungi are a threat in their area hadn’t been updated in half a century.

“Recently, we are finding more cases of these diseases outside their known areas, taking clinicians and patients by surprise,” University of California, Davis infectious disease professor George Thompson, MD, said in a commentary published along with the study.

Published in the journal Clinical Infectious Diseases, the study sought to identify illnesses linked to three types of soil fungi in the United States that are known to cause lung infections. They are called histoplasma, blastomyces, and coccidioides, the latter of which causes an illness known as Valley fever, which has been on the rise in California.

Researchers used data for more than 45 million people who use Medicare and found that at least 1 of these 3 fungi are present in 48 of 50 U.S. states and Washington, D.C.

Symptoms after breathing in the fungi spores include fever and cough and can be similar to symptoms of other illnesses, according to the Centers for Disease Control.

The researchers said health care providers need to increase their suspicion for these fungi, which “would likely result in fewer missed diagnoses, fewer diagnostic delays, and improved patient outcomes.”

A version of this article first appeared on WebMD.com.

A randomized trial indicating that surgical masks are not inferior to N95 masks in protecting health care workers against COVID-19 has sparked international criticism.

The study’s senior author is John Conly, MD, an infectious disease specialist and professor at the University of Calgary (Alta.), and Alberta Health Services. The findings are not consistent with those of many other studies on this topic.

Commenting about Dr. Conly’s study, Eric Topol, MD, editor-in-chief of Medscape, wrote: “It’s woefully underpowered but ruled out a doubling of hazard for use of medical masks.”

The study, which was partially funded by the World Health Organization, was published online in Annals of Internal Medicine.

This is not the first time that Dr. Conly, who also advises the WHO, has been the subject of controversy. He previously denied that COVID-19 is airborne – a position that is contradicted by strong evidence. In 2021, Dr. Conly made headlines with his controversial claim that N95 respirators can cause harms, including oxygen depletion and carbon dioxide retention.

A detailed examination by the Center for Infectious Disease Research and Policy (CIDRAP) at the University of Minnesota, Minneapolis, pointed out numerous scientific flaws in the study, including inconsistent use of both types of masks. The study also examined health care workers in four very different countries (Canada, Israel, Egypt, and Pakistan) during different periods of the pandemic, which may have affected the results. Furthermore, the study did not account for vaccination status and lacked a control group. CIDRAP receives funding from 3M, which makes N95 respirators.

In a commentary published alongside the study, Roger Chou, MD, professor of medicine at Oregon Health & Science University, Portland, said that the results were “not definitive,” with “a generous noninferiority threshold” that is actually “consistent with up to a relative 70% increased risk ... which may be unacceptable to many health workers.”

Lead study author Mark Loeb, MD, professor of infectious diseases at McMaster University, Hamilton, Ont., defended the findings. “The confidence intervals around this, that is, what the possible results could be if the trial was repeated many times, range from −2.5% to 4.9%,” he told this news organization. “This means that the risk of a COVID-19 infection in those using the medical masks could have ranged from anywhere from 2.5% reduction in risk to a 4.9% increase in risk. Readers and policy makers can decide for themselves about this.”

“There is no point continuing to run underpowered, poorly designed studies that are designed to confirm existing biases,” Raina MacIntyre, PhD, professor of global biosecurity and head of the Biosecurity Program at the Kirby Institute, Sydney, said in an interview. “The new study in Annals of Internal Medicine is entirely consistent with our finding that to prevent infection, you need an N95, and it needs to be worn throughout the whole shift. A surgical mask and intermittent use of N95 are equally ineffective. This should not surprise anyone, given a surgical mask is not designed as respiratory protection but is designed to prevent splash or spray of liquid on the face. Only a respirator is designed as respiratory protection through both the seal around the face and the filter of the face piece to prevent inhalation of virus laden aerosols, but you need to wear it continually in a high-risk environment like a hospital.”

“It makes zero sense to do a randomized trial on something you can measure directly,” said Kimberly Prather, PhD, an atmospheric chemist, professor, and director of the NSF Center for Aerosol Impacts on Chemistry of the Environment at the University of California, San Diego. “In fact, many studies have shown aerosols leaking out of surgical masks. Surgical masks are designed to block large spray droplets. Aerosols (0.5-3 mcm), which have been shown to contain infectious SARS-CoV-2 virus, travel with the air flow, and escape.”

“This study ... will be used to justify policies of supplying health care workers, and perhaps patients and visitors, too, with inadequate protection,” Trish Greenhalgh, MD, professor of primary care health sciences at the University of Oxford (England), told this news organization.

“These authors have been pushing back against treating COVID as airborne for 3 years,” David Fisman, MD, an epidemiologist and infectious disease specialist at the University of Toronto, said in an interview. “So, you’ll see these folks brandishing this very flawed trial to justify continuing the infection control practices that have been so disastrous throughout the pandemic.”

The study was funded by the World Health Organization, the Canadian Institutes of Health Research, and the Juravinski Research Institute. Dr. Conly reported receiving grants from the Canadian Institutes for Health Research, Pfizer, and the WHO. Dr. Chou disclosed being a methodologist for WHO guidelines on infection prevention and control measures for COVID-19. Dr. Loeb disclosed payment for expert testimony on personal protective equipment from the government of Manitoba and the Peel District School Board. Dr. MacIntyre has led a large body of research on masks and respirators in health workers, including four randomized clinical trials. She is the author of a book, “Dark Winter: An insider’s guide to pandemics and biosecurity” (Syndey: NewSouth Publishing, 2022), which covers the history and politics of the controversies around N95 and masks. Dr. Prather reported no disclosures. Dr. Greenhalgh is a member of Independent SAGE and an unpaid adviser to the philanthropic fund Balvi. Dr. Fisman has served as a paid legal expert for the Ontario Nurses’ Association in their challenge to Directive 5, which restricted access to N95 masks in health care. He also served as a paid legal expert for the Elementary Teachers’ Federation of Ontario in its efforts to make schools safer in Ontario.

A version of this article first appeared on Medscape.com.

A randomized trial indicating that surgical masks are not inferior to N95 masks in protecting health care workers against COVID-19 has sparked international criticism.

The study’s senior author is John Conly, MD, an infectious disease specialist and professor at the University of Calgary (Alta.), and Alberta Health Services. The findings are not consistent with those of many other studies on this topic.

Commenting about Dr. Conly’s study, Eric Topol, MD, editor-in-chief of Medscape, wrote: “It’s woefully underpowered but ruled out a doubling of hazard for use of medical masks.”

The study, which was partially funded by the World Health Organization, was published online in Annals of Internal Medicine.

This is not the first time that Dr. Conly, who also advises the WHO, has been the subject of controversy. He previously denied that COVID-19 is airborne – a position that is contradicted by strong evidence. In 2021, Dr. Conly made headlines with his controversial claim that N95 respirators can cause harms, including oxygen depletion and carbon dioxide retention.

A detailed examination by the Center for Infectious Disease Research and Policy (CIDRAP) at the University of Minnesota, Minneapolis, pointed out numerous scientific flaws in the study, including inconsistent use of both types of masks. The study also examined health care workers in four very different countries (Canada, Israel, Egypt, and Pakistan) during different periods of the pandemic, which may have affected the results. Furthermore, the study did not account for vaccination status and lacked a control group. CIDRAP receives funding from 3M, which makes N95 respirators.

In a commentary published alongside the study, Roger Chou, MD, professor of medicine at Oregon Health & Science University, Portland, said that the results were “not definitive,” with “a generous noninferiority threshold” that is actually “consistent with up to a relative 70% increased risk ... which may be unacceptable to many health workers.”

Lead study author Mark Loeb, MD, professor of infectious diseases at McMaster University, Hamilton, Ont., defended the findings. “The confidence intervals around this, that is, what the possible results could be if the trial was repeated many times, range from −2.5% to 4.9%,” he told this news organization. “This means that the risk of a COVID-19 infection in those using the medical masks could have ranged from anywhere from 2.5% reduction in risk to a 4.9% increase in risk. Readers and policy makers can decide for themselves about this.”

“There is no point continuing to run underpowered, poorly designed studies that are designed to confirm existing biases,” Raina MacIntyre, PhD, professor of global biosecurity and head of the Biosecurity Program at the Kirby Institute, Sydney, said in an interview. “The new study in Annals of Internal Medicine is entirely consistent with our finding that to prevent infection, you need an N95, and it needs to be worn throughout the whole shift. A surgical mask and intermittent use of N95 are equally ineffective. This should not surprise anyone, given a surgical mask is not designed as respiratory protection but is designed to prevent splash or spray of liquid on the face. Only a respirator is designed as respiratory protection through both the seal around the face and the filter of the face piece to prevent inhalation of virus laden aerosols, but you need to wear it continually in a high-risk environment like a hospital.”

“It makes zero sense to do a randomized trial on something you can measure directly,” said Kimberly Prather, PhD, an atmospheric chemist, professor, and director of the NSF Center for Aerosol Impacts on Chemistry of the Environment at the University of California, San Diego. “In fact, many studies have shown aerosols leaking out of surgical masks. Surgical masks are designed to block large spray droplets. Aerosols (0.5-3 mcm), which have been shown to contain infectious SARS-CoV-2 virus, travel with the air flow, and escape.”

“This study ... will be used to justify policies of supplying health care workers, and perhaps patients and visitors, too, with inadequate protection,” Trish Greenhalgh, MD, professor of primary care health sciences at the University of Oxford (England), told this news organization.

“These authors have been pushing back against treating COVID as airborne for 3 years,” David Fisman, MD, an epidemiologist and infectious disease specialist at the University of Toronto, said in an interview. “So, you’ll see these folks brandishing this very flawed trial to justify continuing the infection control practices that have been so disastrous throughout the pandemic.”

The study was funded by the World Health Organization, the Canadian Institutes of Health Research, and the Juravinski Research Institute. Dr. Conly reported receiving grants from the Canadian Institutes for Health Research, Pfizer, and the WHO. Dr. Chou disclosed being a methodologist for WHO guidelines on infection prevention and control measures for COVID-19. Dr. Loeb disclosed payment for expert testimony on personal protective equipment from the government of Manitoba and the Peel District School Board. Dr. MacIntyre has led a large body of research on masks and respirators in health workers, including four randomized clinical trials. She is the author of a book, “Dark Winter: An insider’s guide to pandemics and biosecurity” (Syndey: NewSouth Publishing, 2022), which covers the history and politics of the controversies around N95 and masks. Dr. Prather reported no disclosures. Dr. Greenhalgh is a member of Independent SAGE and an unpaid adviser to the philanthropic fund Balvi. Dr. Fisman has served as a paid legal expert for the Ontario Nurses’ Association in their challenge to Directive 5, which restricted access to N95 masks in health care. He also served as a paid legal expert for the Elementary Teachers’ Federation of Ontario in its efforts to make schools safer in Ontario.

A version of this article first appeared on Medscape.com.

A randomized trial indicating that surgical masks are not inferior to N95 masks in protecting health care workers against COVID-19 has sparked international criticism.

The study’s senior author is John Conly, MD, an infectious disease specialist and professor at the University of Calgary (Alta.), and Alberta Health Services. The findings are not consistent with those of many other studies on this topic.

Commenting about Dr. Conly’s study, Eric Topol, MD, editor-in-chief of Medscape, wrote: “It’s woefully underpowered but ruled out a doubling of hazard for use of medical masks.”

The study, which was partially funded by the World Health Organization, was published online in Annals of Internal Medicine.

This is not the first time that Dr. Conly, who also advises the WHO, has been the subject of controversy. He previously denied that COVID-19 is airborne – a position that is contradicted by strong evidence. In 2021, Dr. Conly made headlines with his controversial claim that N95 respirators can cause harms, including oxygen depletion and carbon dioxide retention.

A detailed examination by the Center for Infectious Disease Research and Policy (CIDRAP) at the University of Minnesota, Minneapolis, pointed out numerous scientific flaws in the study, including inconsistent use of both types of masks. The study also examined health care workers in four very different countries (Canada, Israel, Egypt, and Pakistan) during different periods of the pandemic, which may have affected the results. Furthermore, the study did not account for vaccination status and lacked a control group. CIDRAP receives funding from 3M, which makes N95 respirators.

In a commentary published alongside the study, Roger Chou, MD, professor of medicine at Oregon Health & Science University, Portland, said that the results were “not definitive,” with “a generous noninferiority threshold” that is actually “consistent with up to a relative 70% increased risk ... which may be unacceptable to many health workers.”

Lead study author Mark Loeb, MD, professor of infectious diseases at McMaster University, Hamilton, Ont., defended the findings. “The confidence intervals around this, that is, what the possible results could be if the trial was repeated many times, range from −2.5% to 4.9%,” he told this news organization. “This means that the risk of a COVID-19 infection in those using the medical masks could have ranged from anywhere from 2.5% reduction in risk to a 4.9% increase in risk. Readers and policy makers can decide for themselves about this.”

“There is no point continuing to run underpowered, poorly designed studies that are designed to confirm existing biases,” Raina MacIntyre, PhD, professor of global biosecurity and head of the Biosecurity Program at the Kirby Institute, Sydney, said in an interview. “The new study in Annals of Internal Medicine is entirely consistent with our finding that to prevent infection, you need an N95, and it needs to be worn throughout the whole shift. A surgical mask and intermittent use of N95 are equally ineffective. This should not surprise anyone, given a surgical mask is not designed as respiratory protection but is designed to prevent splash or spray of liquid on the face. Only a respirator is designed as respiratory protection through both the seal around the face and the filter of the face piece to prevent inhalation of virus laden aerosols, but you need to wear it continually in a high-risk environment like a hospital.”

“It makes zero sense to do a randomized trial on something you can measure directly,” said Kimberly Prather, PhD, an atmospheric chemist, professor, and director of the NSF Center for Aerosol Impacts on Chemistry of the Environment at the University of California, San Diego. “In fact, many studies have shown aerosols leaking out of surgical masks. Surgical masks are designed to block large spray droplets. Aerosols (0.5-3 mcm), which have been shown to contain infectious SARS-CoV-2 virus, travel with the air flow, and escape.”

“This study ... will be used to justify policies of supplying health care workers, and perhaps patients and visitors, too, with inadequate protection,” Trish Greenhalgh, MD, professor of primary care health sciences at the University of Oxford (England), told this news organization.

“These authors have been pushing back against treating COVID as airborne for 3 years,” David Fisman, MD, an epidemiologist and infectious disease specialist at the University of Toronto, said in an interview. “So, you’ll see these folks brandishing this very flawed trial to justify continuing the infection control practices that have been so disastrous throughout the pandemic.”

The study was funded by the World Health Organization, the Canadian Institutes of Health Research, and the Juravinski Research Institute. Dr. Conly reported receiving grants from the Canadian Institutes for Health Research, Pfizer, and the WHO. Dr. Chou disclosed being a methodologist for WHO guidelines on infection prevention and control measures for COVID-19. Dr. Loeb disclosed payment for expert testimony on personal protective equipment from the government of Manitoba and the Peel District School Board. Dr. MacIntyre has led a large body of research on masks and respirators in health workers, including four randomized clinical trials. She is the author of a book, “Dark Winter: An insider’s guide to pandemics and biosecurity” (Syndey: NewSouth Publishing, 2022), which covers the history and politics of the controversies around N95 and masks. Dr. Prather reported no disclosures. Dr. Greenhalgh is a member of Independent SAGE and an unpaid adviser to the philanthropic fund Balvi. Dr. Fisman has served as a paid legal expert for the Ontario Nurses’ Association in their challenge to Directive 5, which restricted access to N95 masks in health care. He also served as a paid legal expert for the Elementary Teachers’ Federation of Ontario in its efforts to make schools safer in Ontario.

A version of this article first appeared on Medscape.com.

Jackie Dishner hasn’t been the same since June 2020, when COVID-19 robbed her of her energy level, ability to think clearly, and sense of taste and smell. Yet at 58, the Arizona writer is in no hurry to get the latest vaccine booster. “I just don’t want to risk getting any sicker,” she said.

Ms. Dishner has had two doses of vaccine plus two boosters. Each time, she had what regulators consider to be mild reactions, including a sore arm, slight fever, nausea, and body aches. Still, there’s some evidence that the newest booster, which protects against some of the later variants, could help people like Ms. Dishner in several ways, said Ziyad Al-Aly, MD, a clinical epidemiologist and prolific long COVID researcher at Washington University in St. Louis.

“A bivalent booster might actually [help with] your long COVID,” he said.

There may be other benefits. “What vaccines or current vaccine boosters do is reduce your risk of progression to severe COVID-19 illness,” Dr. Al-Aly said. “You are avoiding hospital stays or even worse; you’re avoiding potentially fatal outcomes after infection. And that’s really worth it. Who wants to be in the hospital this Christmas holiday?”

Each time people are infected with SARS-CoV-2, the virus that causes COVID-19, they have a fresh risk of not only getting severely ill or dying, but of developing long COVID, Dr. Al-Aly and colleagues found in a study published in Nature Medicine. “If you dodged the bullet the first time and did not get long COVID after the first infection, if you get reinfected, you’re trying your luck again,” Dr. Al-Aly said. “I would advise people not to get reinfected, which is another reason to get the booster.” 

In a recent review in The Lancet eClinicalMedicine, an international team of researchers looked at 11 studies that sought to find out if vaccines affected long COVID symptoms. Seven of those studies found that people’s symptoms improved after they were vaccinated, and four found that symptoms mostly remained the same. One found symptoms got worse in some patients. 

A study of 28,000 people published in the British Medical Journal found more evidence that vaccination may help ease symptoms. “Vaccination may contribute to a reduction in the population health burden of long COVID,” the team at the United Kingdom’s Office for National Statistics concluded. Most studies found vaccination reduced the risk of getting long COVID in the first place.

Vaccines prompt the body to produce antibodies, which stop a microbe from infecting cells. They also prompt the production of immune cells called T cells, which continue to hunt down and attack a pathogen even after infection.

A booster dose could help rev up that immune response in a patient with long COVID, said Stephen J. Thomas, MD, an infectious disease specialist at Upstate Medical Center in Syracuse, N.Y., and the center’s lead principal investigator for Pfizer/BioNTech’s COVID-19 2020 vaccine trial.

Some scientists believe long COVID might be caused when the virus persists in parts of the body where the immune system isn’t particularly active. Although they don’t fully understand the workings of the many and varied long COVID symptoms, they have a good idea about why people with long COVID often do better after receiving a vaccine or booster.

“The theory is that by boosting, the immune system may be able to ‘mop up’ those virus stragglers that have remained behind after your first cleanup attempt,” Dr. Thomas said.

“The vaccine is almost lending a hand or helping your immune response to clear that virus,” Dr. Al-Aly said.

It could be difficult for long COVID patients to make an informed decision about boosters, given the lack of studies that focus exclusively on the relationship between long COVID and boosters, according to Scott Roberts, MD, associate medical director for infection prevention at Yale New Haven (Conn.) Hospital. 

Dr. Roberts recommended that patients speak with their health care providers and read about the bivalent booster on trusted sites such as those sponsored by the Food and Drug Administration and the Centers for Disease Control and Prevention. Long COVID patients should get the latest boosters, especially as there’s no evidence they are unsafe for them. “The antibody response is appropriately boosted, and there is a decent chance this will help reduce the impact of long COVID as well,” he said. “Waiting will only increase the risk of getting infected and increase the chances of long COVID.”

Only 12% of Americans 5 years and older have received the updated booster, according to the CDC, although it’s recommended for everyone. Just over 80% of Americans have gotten at least one vaccine dose. Dr. Thomas understands why the uptake has been so low: Along with people like Ms. Dishner, who fear more side effects or worse symptoms, there are those who believe that hybrid immunity – vaccination immunity plus natural infection – is superior to vaccination alone and that they don’t need a booster.

Studies show that the bivalent boosters, which protect against older and newer variants, can target even the new, predominant COVID-19 strains. Whether that is enough to convince people in the no-booster camp who lost faith when their vaccinated peers started getting COVID-19 is unclear, although, as Dr. Al-Aly has pointed out, vaccinations help keep people from getting so sick that they wind up in the hospital. And, with most of the population having received at least one dose of vaccine, most of those getting infected will naturally come from among the vaccinated.

Thomas describes the expectation that vaccines would prevent everyone from getting sick as “one of the major fails” of the pandemic.

Counting on a vaccine to confer 100% immunity is “a very high bar,” he said. “I think that’s what people expected, and when they weren’t seeing it, they kind of said: ‘Well, what’s the point? You know, things are getting better. I’d rather take my chances than keep going and getting boosted.’ ”

One point – and it’s a critical one – is that vaccination immunity wanes. Plus new variants arise that can evade at least some of the immunity provided by vaccination. That’s why boosters are built into the COVID vaccination program.

While it’s not clear why some long COVID patients see improvements in their symptoms after being vaccinated or boosted and others do not, Dr. Al-Aly said there’s little evidence vaccines can make long COVID worse. “There are some reports out there that some people with long COVID, when they got a vaccine or booster, their symptoms got worse. You’ll read anecdotes on this side,” he said, adding that efforts to see if this is really happening have been inconclusive.

“The general consensus is that vaccines really save lives,” Dr. Al-Aly said. “Getting vaccinated, even if you are a long COVID patient, is better than not getting vaccinated.”

A version of this article first appeared on WebMD.com.

Jackie Dishner hasn’t been the same since June 2020, when COVID-19 robbed her of her energy level, ability to think clearly, and sense of taste and smell. Yet at 58, the Arizona writer is in no hurry to get the latest vaccine booster. “I just don’t want to risk getting any sicker,” she said.

Ms. Dishner has had two doses of vaccine plus two boosters. Each time, she had what regulators consider to be mild reactions, including a sore arm, slight fever, nausea, and body aches. Still, there’s some evidence that the newest booster, which protects against some of the later variants, could help people like Ms. Dishner in several ways, said Ziyad Al-Aly, MD, a clinical epidemiologist and prolific long COVID researcher at Washington University in St. Louis.

“A bivalent booster might actually [help with] your long COVID,” he said.

There may be other benefits. “What vaccines or current vaccine boosters do is reduce your risk of progression to severe COVID-19 illness,” Dr. Al-Aly said. “You are avoiding hospital stays or even worse; you’re avoiding potentially fatal outcomes after infection. And that’s really worth it. Who wants to be in the hospital this Christmas holiday?”

Each time people are infected with SARS-CoV-2, the virus that causes COVID-19, they have a fresh risk of not only getting severely ill or dying, but of developing long COVID, Dr. Al-Aly and colleagues found in a study published in Nature Medicine. “If you dodged the bullet the first time and did not get long COVID after the first infection, if you get reinfected, you’re trying your luck again,” Dr. Al-Aly said. “I would advise people not to get reinfected, which is another reason to get the booster.” 

In a recent review in The Lancet eClinicalMedicine, an international team of researchers looked at 11 studies that sought to find out if vaccines affected long COVID symptoms. Seven of those studies found that people’s symptoms improved after they were vaccinated, and four found that symptoms mostly remained the same. One found symptoms got worse in some patients. 

A study of 28,000 people published in the British Medical Journal found more evidence that vaccination may help ease symptoms. “Vaccination may contribute to a reduction in the population health burden of long COVID,” the team at the United Kingdom’s Office for National Statistics concluded. Most studies found vaccination reduced the risk of getting long COVID in the first place.

Vaccines prompt the body to produce antibodies, which stop a microbe from infecting cells. They also prompt the production of immune cells called T cells, which continue to hunt down and attack a pathogen even after infection.

A booster dose could help rev up that immune response in a patient with long COVID, said Stephen J. Thomas, MD, an infectious disease specialist at Upstate Medical Center in Syracuse, N.Y., and the center’s lead principal investigator for Pfizer/BioNTech’s COVID-19 2020 vaccine trial.

Some scientists believe long COVID might be caused when the virus persists in parts of the body where the immune system isn’t particularly active. Although they don’t fully understand the workings of the many and varied long COVID symptoms, they have a good idea about why people with long COVID often do better after receiving a vaccine or booster.

“The theory is that by boosting, the immune system may be able to ‘mop up’ those virus stragglers that have remained behind after your first cleanup attempt,” Dr. Thomas said.

“The vaccine is almost lending a hand or helping your immune response to clear that virus,” Dr. Al-Aly said.

It could be difficult for long COVID patients to make an informed decision about boosters, given the lack of studies that focus exclusively on the relationship between long COVID and boosters, according to Scott Roberts, MD, associate medical director for infection prevention at Yale New Haven (Conn.) Hospital. 

Dr. Roberts recommended that patients speak with their health care providers and read about the bivalent booster on trusted sites such as those sponsored by the Food and Drug Administration and the Centers for Disease Control and Prevention. Long COVID patients should get the latest boosters, especially as there’s no evidence they are unsafe for them. “The antibody response is appropriately boosted, and there is a decent chance this will help reduce the impact of long COVID as well,” he said. “Waiting will only increase the risk of getting infected and increase the chances of long COVID.”

Only 12% of Americans 5 years and older have received the updated booster, according to the CDC, although it’s recommended for everyone. Just over 80% of Americans have gotten at least one vaccine dose. Dr. Thomas understands why the uptake has been so low: Along with people like Ms. Dishner, who fear more side effects or worse symptoms, there are those who believe that hybrid immunity – vaccination immunity plus natural infection – is superior to vaccination alone and that they don’t need a booster.

Studies show that the bivalent boosters, which protect against older and newer variants, can target even the new, predominant COVID-19 strains. Whether that is enough to convince people in the no-booster camp who lost faith when their vaccinated peers started getting COVID-19 is unclear, although, as Dr. Al-Aly has pointed out, vaccinations help keep people from getting so sick that they wind up in the hospital. And, with most of the population having received at least one dose of vaccine, most of those getting infected will naturally come from among the vaccinated.

Thomas describes the expectation that vaccines would prevent everyone from getting sick as “one of the major fails” of the pandemic.

Counting on a vaccine to confer 100% immunity is “a very high bar,” he said. “I think that’s what people expected, and when they weren’t seeing it, they kind of said: ‘Well, what’s the point? You know, things are getting better. I’d rather take my chances than keep going and getting boosted.’ ”

One point – and it’s a critical one – is that vaccination immunity wanes. Plus new variants arise that can evade at least some of the immunity provided by vaccination. That’s why boosters are built into the COVID vaccination program.

While it’s not clear why some long COVID patients see improvements in their symptoms after being vaccinated or boosted and others do not, Dr. Al-Aly said there’s little evidence vaccines can make long COVID worse. “There are some reports out there that some people with long COVID, when they got a vaccine or booster, their symptoms got worse. You’ll read anecdotes on this side,” he said, adding that efforts to see if this is really happening have been inconclusive.

“The general consensus is that vaccines really save lives,” Dr. Al-Aly said. “Getting vaccinated, even if you are a long COVID patient, is better than not getting vaccinated.”

A version of this article first appeared on WebMD.com.

Jackie Dishner hasn’t been the same since June 2020, when COVID-19 robbed her of her energy level, ability to think clearly, and sense of taste and smell. Yet at 58, the Arizona writer is in no hurry to get the latest vaccine booster. “I just don’t want to risk getting any sicker,” she said.

Ms. Dishner has had two doses of vaccine plus two boosters. Each time, she had what regulators consider to be mild reactions, including a sore arm, slight fever, nausea, and body aches. Still, there’s some evidence that the newest booster, which protects against some of the later variants, could help people like Ms. Dishner in several ways, said Ziyad Al-Aly, MD, a clinical epidemiologist and prolific long COVID researcher at Washington University in St. Louis.

“A bivalent booster might actually [help with] your long COVID,” he said.

There may be other benefits. “What vaccines or current vaccine boosters do is reduce your risk of progression to severe COVID-19 illness,” Dr. Al-Aly said. “You are avoiding hospital stays or even worse; you’re avoiding potentially fatal outcomes after infection. And that’s really worth it. Who wants to be in the hospital this Christmas holiday?”

Each time people are infected with SARS-CoV-2, the virus that causes COVID-19, they have a fresh risk of not only getting severely ill or dying, but of developing long COVID, Dr. Al-Aly and colleagues found in a study published in Nature Medicine. “If you dodged the bullet the first time and did not get long COVID after the first infection, if you get reinfected, you’re trying your luck again,” Dr. Al-Aly said. “I would advise people not to get reinfected, which is another reason to get the booster.” 

In a recent review in The Lancet eClinicalMedicine, an international team of researchers looked at 11 studies that sought to find out if vaccines affected long COVID symptoms. Seven of those studies found that people’s symptoms improved after they were vaccinated, and four found that symptoms mostly remained the same. One found symptoms got worse in some patients. 

A study of 28,000 people published in the British Medical Journal found more evidence that vaccination may help ease symptoms. “Vaccination may contribute to a reduction in the population health burden of long COVID,” the team at the United Kingdom’s Office for National Statistics concluded. Most studies found vaccination reduced the risk of getting long COVID in the first place.

Vaccines prompt the body to produce antibodies, which stop a microbe from infecting cells. They also prompt the production of immune cells called T cells, which continue to hunt down and attack a pathogen even after infection.

A booster dose could help rev up that immune response in a patient with long COVID, said Stephen J. Thomas, MD, an infectious disease specialist at Upstate Medical Center in Syracuse, N.Y., and the center’s lead principal investigator for Pfizer/BioNTech’s COVID-19 2020 vaccine trial.

Some scientists believe long COVID might be caused when the virus persists in parts of the body where the immune system isn’t particularly active. Although they don’t fully understand the workings of the many and varied long COVID symptoms, they have a good idea about why people with long COVID often do better after receiving a vaccine or booster.

“The theory is that by boosting, the immune system may be able to ‘mop up’ those virus stragglers that have remained behind after your first cleanup attempt,” Dr. Thomas said.

“The vaccine is almost lending a hand or helping your immune response to clear that virus,” Dr. Al-Aly said.

It could be difficult for long COVID patients to make an informed decision about boosters, given the lack of studies that focus exclusively on the relationship between long COVID and boosters, according to Scott Roberts, MD, associate medical director for infection prevention at Yale New Haven (Conn.) Hospital. 

Dr. Roberts recommended that patients speak with their health care providers and read about the bivalent booster on trusted sites such as those sponsored by the Food and Drug Administration and the Centers for Disease Control and Prevention. Long COVID patients should get the latest boosters, especially as there’s no evidence they are unsafe for them. “The antibody response is appropriately boosted, and there is a decent chance this will help reduce the impact of long COVID as well,” he said. “Waiting will only increase the risk of getting infected and increase the chances of long COVID.”

Only 12% of Americans 5 years and older have received the updated booster, according to the CDC, although it’s recommended for everyone. Just over 80% of Americans have gotten at least one vaccine dose. Dr. Thomas understands why the uptake has been so low: Along with people like Ms. Dishner, who fear more side effects or worse symptoms, there are those who believe that hybrid immunity – vaccination immunity plus natural infection – is superior to vaccination alone and that they don’t need a booster.

Studies show that the bivalent boosters, which protect against older and newer variants, can target even the new, predominant COVID-19 strains. Whether that is enough to convince people in the no-booster camp who lost faith when their vaccinated peers started getting COVID-19 is unclear, although, as Dr. Al-Aly has pointed out, vaccinations help keep people from getting so sick that they wind up in the hospital. And, with most of the population having received at least one dose of vaccine, most of those getting infected will naturally come from among the vaccinated.

Thomas describes the expectation that vaccines would prevent everyone from getting sick as “one of the major fails” of the pandemic.

Counting on a vaccine to confer 100% immunity is “a very high bar,” he said. “I think that’s what people expected, and when they weren’t seeing it, they kind of said: ‘Well, what’s the point? You know, things are getting better. I’d rather take my chances than keep going and getting boosted.’ ”

One point – and it’s a critical one – is that vaccination immunity wanes. Plus new variants arise that can evade at least some of the immunity provided by vaccination. That’s why boosters are built into the COVID vaccination program.

While it’s not clear why some long COVID patients see improvements in their symptoms after being vaccinated or boosted and others do not, Dr. Al-Aly said there’s little evidence vaccines can make long COVID worse. “There are some reports out there that some people with long COVID, when they got a vaccine or booster, their symptoms got worse. You’ll read anecdotes on this side,” he said, adding that efforts to see if this is really happening have been inconclusive.

“The general consensus is that vaccines really save lives,” Dr. Al-Aly said. “Getting vaccinated, even if you are a long COVID patient, is better than not getting vaccinated.”

A version of this article first appeared on WebMD.com.

(Reuters) – Eli Lilly’s COVID-19 drug bebtelovimab is not currently authorized for emergency use in the United States, the Food and Drug Administration said, citing it is not expected to neutralize the dominant BQ.1 and BQ.1.1 subvariants of Omicron.

The announcement on Nov. 30 takes away authorization from the last COVID-19 monoclonal antibody treatment, leaving Pfizer’s antiviral drug Paxlovid, Merck’s Lagevrio, and Gilead Sciences’ Veklury as treatments for the disease, besides convalescent plasma for some patients.

AstraZeneca’s monoclonal antibody Evusheld is also authorized for protection against COVID-19 infection in some people.

Eli Lilly and its authorized distributors have paused commercial distribution of the monoclonal antibody until further notice from the agency, while the U.S. government has also paused fulfillment of any pending requests under its scheme to help uninsured and underinsured Americans access the drug.

The drug, which was discovered by Abcellera and commercialized by Eli Lilly, received an authorization from the FDA in February.

BQ.1 and BQ.1.1 have become the dominant strains in the United States after a steady increase in prevalence over the last 2 months, surpassing Omicron’s BA.5 subvariant, which had driven cases earlier in the year.

The subvariants accounted for around 57% of the cases nationally, as per government data last week.

Reuters Health Information © 2022 

(Reuters) – Eli Lilly’s COVID-19 drug bebtelovimab is not currently authorized for emergency use in the United States, the Food and Drug Administration said, citing it is not expected to neutralize the dominant BQ.1 and BQ.1.1 subvariants of Omicron.

The announcement on Nov. 30 takes away authorization from the last COVID-19 monoclonal antibody treatment, leaving Pfizer’s antiviral drug Paxlovid, Merck’s Lagevrio, and Gilead Sciences’ Veklury as treatments for the disease, besides convalescent plasma for some patients.

AstraZeneca’s monoclonal antibody Evusheld is also authorized for protection against COVID-19 infection in some people.

Eli Lilly and its authorized distributors have paused commercial distribution of the monoclonal antibody until further notice from the agency, while the U.S. government has also paused fulfillment of any pending requests under its scheme to help uninsured and underinsured Americans access the drug.

The drug, which was discovered by Abcellera and commercialized by Eli Lilly, received an authorization from the FDA in February.

BQ.1 and BQ.1.1 have become the dominant strains in the United States after a steady increase in prevalence over the last 2 months, surpassing Omicron’s BA.5 subvariant, which had driven cases earlier in the year.

The subvariants accounted for around 57% of the cases nationally, as per government data last week.

Reuters Health Information © 2022 

(Reuters) – Eli Lilly’s COVID-19 drug bebtelovimab is not currently authorized for emergency use in the United States, the Food and Drug Administration said, citing it is not expected to neutralize the dominant BQ.1 and BQ.1.1 subvariants of Omicron.

The announcement on Nov. 30 takes away authorization from the last COVID-19 monoclonal antibody treatment, leaving Pfizer’s antiviral drug Paxlovid, Merck’s Lagevrio, and Gilead Sciences’ Veklury as treatments for the disease, besides convalescent plasma for some patients.

AstraZeneca’s monoclonal antibody Evusheld is also authorized for protection against COVID-19 infection in some people.

Eli Lilly and its authorized distributors have paused commercial distribution of the monoclonal antibody until further notice from the agency, while the U.S. government has also paused fulfillment of any pending requests under its scheme to help uninsured and underinsured Americans access the drug.

The drug, which was discovered by Abcellera and commercialized by Eli Lilly, received an authorization from the FDA in February.

BQ.1 and BQ.1.1 have become the dominant strains in the United States after a steady increase in prevalence over the last 2 months, surpassing Omicron’s BA.5 subvariant, which had driven cases earlier in the year.

The subvariants accounted for around 57% of the cases nationally, as per government data last week.

Reuters Health Information © 2022 

Doctors suspect the worst respiratory syncytial virus (RSV) season in years just ended, and the story of a child who had a serious respiratory infection provides a glimpse of what health care providers saw in the fall of 2022.

RSV cases peaked in mid-November, according to the latest Centers for Disease Control and Prevention data, with RSV-associated hospitalizations in the United States among patients 0-4 years having maxed out five times higher than they were at the same time in 2021. These surges strained providers and left parents scrambling for care. Fortunately, pediatric hospitalizations appear to be subsiding.

In interviews, the parents of the child who had a severe case of RSV reflected on their son’s bout with the illness, and doctors described challenges to dealing with the surge in RSV cases this season. The physicians also offered advice on how recognize and respond to future cases of the virus.
 

Sebastian Witt’s story

“I didn’t even know what RSV was,” said Malte Witt, whose son, Sebastian, 2, was recently hospitalized for RSV in Denver.

Mr. Witt and his wife, Emily Witt, both 32, thought they were dealing with a typical cold until Sebastian’s condition dramatically deteriorated about 36 hours after symptom onset.

“He basically just slumped over and collapsed, coughing uncontrollably,” Mr. Witt said in an interview. “He couldn’t catch his breath.”

The Witts rushed Sebastian to the ED at Children’s Hospital Colorado, expecting to see a doctor immediately. Instead, they spent the night in an overcrowded waiting room alongside many other families in the same situation.

“There was no room for anyone to sit anywhere,” Mr. Witt said. “There were people sitting on the floor. I counted maybe six children hooked up to oxygen when we walked in.”

After waiting approximately 45 minutes, a nurse checked Sebastian’s oxygen saturation. The readings were 79%-83%. This range is significantly below thresholds for supplemental oxygen described by most pediatric guidelines, which range from 90 to 94%.

The nurse connected Sebastian to bottled oxygen in the waiting room, and a recheck 4 hours later showed that his oxygen saturation had improved.

But the improvement didn’t last.

“At roughly hour 10 in the waiting room – it was 4 in the morning – you could tell that Seb was exhausted, really not acting like himself,” Mr. Witt said. “We thought maybe it’s just late at night, he hasn’t really slept. But then Emily noticed that his oxygen tank had run out.”

Mr. Witt told a nurse, and after another check revealed low oxygen saturation, Sebastian was finally admitted.
 

Early RSV surge strains pediatric providers

With RSV-associated hospitalizations peaking at 48 per 100,000 children, Colorado has been among the states hardest hit by the virus. New Mexico – where hospitalizations peaked at 56.4 per 100,000 children – comes in second. Even in states like California, where hospitalization rates have been almost 10-fold lower than New Mexico, pediatric providers have been stretched to their limits.

“Many hospitals are really being overwhelmed with admissions for RSV, both routine RSV – relatively mild hospitalizations with bronchiolitis – as well as kids in the ICU with more severe cases,” said Dean Blumberg, MD, chief of the division of pediatric infectious diseases at UC Davis Health, Sacramento, said in an interview.

Dr. Blumberg believes the severity of the 2022-2023 RSV season is likely COVID related.

“All community-associated respiratory viral infections are out of whack because of the pandemic, and all the masking and social distancing that was occurring,” he said.

This may also explain why older kids are coming down with more severe cases of RSV.

“Some children are getting RSV for the first time as older children,” Dr. Blumberg said, noting that, historically, most children were infected in the first 2 years of life. “There are reports of children 3 or 4 years of age being admitted with their first episode of RSV because of the [COVID] pandemic.”

This year’s RSV season is also notable for arriving early, potentially catching the community off guard, according to Jennifer D. Kusma, MD, a primary care pediatrician at Ann & Robert H. Lurie Children’s Hospital of Chicago.

“People who should have been protected often weren’t protected yet,” Dr. Kusma said in an interview.
 

Treatments new, old, and unproven

On Nov. 17, in the midst of the RSV surge, the American Academy of Pediatrics issued updated guidance for palivizumab, an RSV-targeting monoclonal antibody labeled for children at risk of severe RSV, including those with pre-existing lung or heart conditions, and infants with a history of premature birth (less than or equal to 35 weeks’ gestational age).

“If RSV disease activity persists at high levels in a given region through the fall and winter, the AAP supports providing more than five consecutive doses of palivizumab to eligible children,” the update stated.

Insurance companies appear to be responding in kind, covering additional doses for children in need.

“[Payers] have agreed that, if [palivizumab] needs to be given for an additional month or 2 or 3, then they’re making a commitment that they’ll reimburse hospitals for providing that,” Dr. Blumberg said.

For ineligible patients, such as Sebastian, who was born prematurely at 36 weeks – 1 week shy of the label requirement – treatment relies upon supportive care with oxygen and IV fluids.

At home, parents are left with simpler options.

Dr. Blumberg and Dr. Kusma recommended keeping children hydrated, maintaining humidified air, and using saline nose drops with bulb suction to clear mucus.

In the Witts’ experience, that last step may be easier said than done.

“Every time a nurse would walk into the room, Sebastian would yell: ‘Go away, doctor! I don’t want snot sucker!’” Mr. Witt said.

“If you over snot-suck, that’s really uncomfortable for the kid, and really hard for you,” Ms. Witt said. “And it doesn’t make much of a difference. It’s just very hard to find a middle ground, where you’re helping and keeping them comfortable.”

Some parents are turning to novel strategies, such as nebulized hypertonic saline, currently marketed on Amazon for children with RSV.

Although the AAP offers a weak recommendation for nebulized hypertonic saline in children hospitalized more than 72 hours, they advise against it in the emergency setting, citing inconsistent findings in clinical trials.

To any parents tempted by thousands of positive Amazon reviews, Dr. Blumberg said, “I wouldn’t waste my money on that.”

Dr. Kusma agreed.

“[Nebulized hypertonic saline] can be irritating,” she said. “It’s saltwater, essentially. If a parent is in the position where they’re worried about their child’s breathing to the point that they think they need to use it, I would err on the side of calling your pediatrician and being seen.”
 

Going in, coming home

Dr. Kusma said parents should seek medical attention if a child is breathing faster and working harder to get air. Increased work of breathing is characterized by pulling of the skin at the notch where the throat meets the chest bone (tracheal tugging), and flattening of the belly that makes the ribcage more prominent.

Mr. Witt saw these signs in Sebastian. He knew they were significant, because a friend who is a nurse had previously shown him some examples of children who exhibited these symptoms online.

“That’s how I knew that things were actually really dangerous,” Mr. Witt said. “Had she not shown me those videos a month and a half before this happened, I don’t know that we would have hit the alarm bell as quickly as we did.”

After spending their second night and the following day in a cramped preoperative room converted to manage overflow from the emergency department, Sebastian’s condition improved, and he was discharged. The Witts are relieved to be home, but frustrations from their ordeal remain, especially considering the estimated $5,000 in out-of-pocket costs they expect to pay.

“How is this our health care system?” Ms. Witt asked. “This is unbelievable.”
 

An optimistic outlook

RSV seasons typically demonstrate a clear peak, followed by a decline through the rest of the season, suggesting better times lie ahead; however, this season has been anything but typical.

“I’m hopeful that it will just go away and stay away,” Dr. Kusma said, citing this trend. “But I can’t know for sure.”

To anxious parents, Dr. Blumberg offered an optimistic view of RSV seasons to come.

“There’s hope,” he said. “There are vaccines that are being developed that are very close to FDA approval. So, it’s possible that this time next year, we might have widespread RSV vaccination available for children so that we don’t have to go through this nightmare again.”

Dr. Blumberg and Dr. Kusma disclosed no relevant conflicts of interest.

Doctors suspect the worst respiratory syncytial virus (RSV) season in years just ended, and the story of a child who had a serious respiratory infection provides a glimpse of what health care providers saw in the fall of 2022.

RSV cases peaked in mid-November, according to the latest Centers for Disease Control and Prevention data, with RSV-associated hospitalizations in the United States among patients 0-4 years having maxed out five times higher than they were at the same time in 2021. These surges strained providers and left parents scrambling for care. Fortunately, pediatric hospitalizations appear to be subsiding.

In interviews, the parents of the child who had a severe case of RSV reflected on their son’s bout with the illness, and doctors described challenges to dealing with the surge in RSV cases this season. The physicians also offered advice on how recognize and respond to future cases of the virus.
 

Sebastian Witt’s story

“I didn’t even know what RSV was,” said Malte Witt, whose son, Sebastian, 2, was recently hospitalized for RSV in Denver.

Mr. Witt and his wife, Emily Witt, both 32, thought they were dealing with a typical cold until Sebastian’s condition dramatically deteriorated about 36 hours after symptom onset.

“He basically just slumped over and collapsed, coughing uncontrollably,” Mr. Witt said in an interview. “He couldn’t catch his breath.”

The Witts rushed Sebastian to the ED at Children’s Hospital Colorado, expecting to see a doctor immediately. Instead, they spent the night in an overcrowded waiting room alongside many other families in the same situation.

“There was no room for anyone to sit anywhere,” Mr. Witt said. “There were people sitting on the floor. I counted maybe six children hooked up to oxygen when we walked in.”

After waiting approximately 45 minutes, a nurse checked Sebastian’s oxygen saturation. The readings were 79%-83%. This range is significantly below thresholds for supplemental oxygen described by most pediatric guidelines, which range from 90 to 94%.

The nurse connected Sebastian to bottled oxygen in the waiting room, and a recheck 4 hours later showed that his oxygen saturation had improved.

But the improvement didn’t last.

“At roughly hour 10 in the waiting room – it was 4 in the morning – you could tell that Seb was exhausted, really not acting like himself,” Mr. Witt said. “We thought maybe it’s just late at night, he hasn’t really slept. But then Emily noticed that his oxygen tank had run out.”

Mr. Witt told a nurse, and after another check revealed low oxygen saturation, Sebastian was finally admitted.
 

Early RSV surge strains pediatric providers

With RSV-associated hospitalizations peaking at 48 per 100,000 children, Colorado has been among the states hardest hit by the virus. New Mexico – where hospitalizations peaked at 56.4 per 100,000 children – comes in second. Even in states like California, where hospitalization rates have been almost 10-fold lower than New Mexico, pediatric providers have been stretched to their limits.

“Many hospitals are really being overwhelmed with admissions for RSV, both routine RSV – relatively mild hospitalizations with bronchiolitis – as well as kids in the ICU with more severe cases,” said Dean Blumberg, MD, chief of the division of pediatric infectious diseases at UC Davis Health, Sacramento, said in an interview.

Dr. Blumberg believes the severity of the 2022-2023 RSV season is likely COVID related.

“All community-associated respiratory viral infections are out of whack because of the pandemic, and all the masking and social distancing that was occurring,” he said.

This may also explain why older kids are coming down with more severe cases of RSV.

“Some children are getting RSV for the first time as older children,” Dr. Blumberg said, noting that, historically, most children were infected in the first 2 years of life. “There are reports of children 3 or 4 years of age being admitted with their first episode of RSV because of the [COVID] pandemic.”

This year’s RSV season is also notable for arriving early, potentially catching the community off guard, according to Jennifer D. Kusma, MD, a primary care pediatrician at Ann & Robert H. Lurie Children’s Hospital of Chicago.

“People who should have been protected often weren’t protected yet,” Dr. Kusma said in an interview.
 

Treatments new, old, and unproven

On Nov. 17, in the midst of the RSV surge, the American Academy of Pediatrics issued updated guidance for palivizumab, an RSV-targeting monoclonal antibody labeled for children at risk of severe RSV, including those with pre-existing lung or heart conditions, and infants with a history of premature birth (less than or equal to 35 weeks’ gestational age).

“If RSV disease activity persists at high levels in a given region through the fall and winter, the AAP supports providing more than five consecutive doses of palivizumab to eligible children,” the update stated.

Insurance companies appear to be responding in kind, covering additional doses for children in need.

“[Payers] have agreed that, if [palivizumab] needs to be given for an additional month or 2 or 3, then they’re making a commitment that they’ll reimburse hospitals for providing that,” Dr. Blumberg said.

For ineligible patients, such as Sebastian, who was born prematurely at 36 weeks – 1 week shy of the label requirement – treatment relies upon supportive care with oxygen and IV fluids.

At home, parents are left with simpler options.

Dr. Blumberg and Dr. Kusma recommended keeping children hydrated, maintaining humidified air, and using saline nose drops with bulb suction to clear mucus.

In the Witts’ experience, that last step may be easier said than done.

“Every time a nurse would walk into the room, Sebastian would yell: ‘Go away, doctor! I don’t want snot sucker!’” Mr. Witt said.

“If you over snot-suck, that’s really uncomfortable for the kid, and really hard for you,” Ms. Witt said. “And it doesn’t make much of a difference. It’s just very hard to find a middle ground, where you’re helping and keeping them comfortable.”

Some parents are turning to novel strategies, such as nebulized hypertonic saline, currently marketed on Amazon for children with RSV.

Although the AAP offers a weak recommendation for nebulized hypertonic saline in children hospitalized more than 72 hours, they advise against it in the emergency setting, citing inconsistent findings in clinical trials.

To any parents tempted by thousands of positive Amazon reviews, Dr. Blumberg said, “I wouldn’t waste my money on that.”

Dr. Kusma agreed.

“[Nebulized hypertonic saline] can be irritating,” she said. “It’s saltwater, essentially. If a parent is in the position where they’re worried about their child’s breathing to the point that they think they need to use it, I would err on the side of calling your pediatrician and being seen.”
 

Going in, coming home

Dr. Kusma said parents should seek medical attention if a child is breathing faster and working harder to get air. Increased work of breathing is characterized by pulling of the skin at the notch where the throat meets the chest bone (tracheal tugging), and flattening of the belly that makes the ribcage more prominent.

Mr. Witt saw these signs in Sebastian. He knew they were significant, because a friend who is a nurse had previously shown him some examples of children who exhibited these symptoms online.

“That’s how I knew that things were actually really dangerous,” Mr. Witt said. “Had she not shown me those videos a month and a half before this happened, I don’t know that we would have hit the alarm bell as quickly as we did.”

After spending their second night and the following day in a cramped preoperative room converted to manage overflow from the emergency department, Sebastian’s condition improved, and he was discharged. The Witts are relieved to be home, but frustrations from their ordeal remain, especially considering the estimated $5,000 in out-of-pocket costs they expect to pay.

“How is this our health care system?” Ms. Witt asked. “This is unbelievable.”
 

An optimistic outlook

RSV seasons typically demonstrate a clear peak, followed by a decline through the rest of the season, suggesting better times lie ahead; however, this season has been anything but typical.

“I’m hopeful that it will just go away and stay away,” Dr. Kusma said, citing this trend. “But I can’t know for sure.”

To anxious parents, Dr. Blumberg offered an optimistic view of RSV seasons to come.

“There’s hope,” he said. “There are vaccines that are being developed that are very close to FDA approval. So, it’s possible that this time next year, we might have widespread RSV vaccination available for children so that we don’t have to go through this nightmare again.”

Dr. Blumberg and Dr. Kusma disclosed no relevant conflicts of interest.

Doctors suspect the worst respiratory syncytial virus (RSV) season in years just ended, and the story of a child who had a serious respiratory infection provides a glimpse of what health care providers saw in the fall of 2022.

RSV cases peaked in mid-November, according to the latest Centers for Disease Control and Prevention data, with RSV-associated hospitalizations in the United States among patients 0-4 years having maxed out five times higher than they were at the same time in 2021. These surges strained providers and left parents scrambling for care. Fortunately, pediatric hospitalizations appear to be subsiding.

In interviews, the parents of the child who had a severe case of RSV reflected on their son’s bout with the illness, and doctors described challenges to dealing with the surge in RSV cases this season. The physicians also offered advice on how recognize and respond to future cases of the virus.
 

Sebastian Witt’s story

“I didn’t even know what RSV was,” said Malte Witt, whose son, Sebastian, 2, was recently hospitalized for RSV in Denver.

Mr. Witt and his wife, Emily Witt, both 32, thought they were dealing with a typical cold until Sebastian’s condition dramatically deteriorated about 36 hours after symptom onset.

“He basically just slumped over and collapsed, coughing uncontrollably,” Mr. Witt said in an interview. “He couldn’t catch his breath.”

The Witts rushed Sebastian to the ED at Children’s Hospital Colorado, expecting to see a doctor immediately. Instead, they spent the night in an overcrowded waiting room alongside many other families in the same situation.

“There was no room for anyone to sit anywhere,” Mr. Witt said. “There were people sitting on the floor. I counted maybe six children hooked up to oxygen when we walked in.”

After waiting approximately 45 minutes, a nurse checked Sebastian’s oxygen saturation. The readings were 79%-83%. This range is significantly below thresholds for supplemental oxygen described by most pediatric guidelines, which range from 90 to 94%.

The nurse connected Sebastian to bottled oxygen in the waiting room, and a recheck 4 hours later showed that his oxygen saturation had improved.

But the improvement didn’t last.

“At roughly hour 10 in the waiting room – it was 4 in the morning – you could tell that Seb was exhausted, really not acting like himself,” Mr. Witt said. “We thought maybe it’s just late at night, he hasn’t really slept. But then Emily noticed that his oxygen tank had run out.”

Mr. Witt told a nurse, and after another check revealed low oxygen saturation, Sebastian was finally admitted.
 

Early RSV surge strains pediatric providers

With RSV-associated hospitalizations peaking at 48 per 100,000 children, Colorado has been among the states hardest hit by the virus. New Mexico – where hospitalizations peaked at 56.4 per 100,000 children – comes in second. Even in states like California, where hospitalization rates have been almost 10-fold lower than New Mexico, pediatric providers have been stretched to their limits.

“Many hospitals are really being overwhelmed with admissions for RSV, both routine RSV – relatively mild hospitalizations with bronchiolitis – as well as kids in the ICU with more severe cases,” said Dean Blumberg, MD, chief of the division of pediatric infectious diseases at UC Davis Health, Sacramento, said in an interview.

Dr. Blumberg believes the severity of the 2022-2023 RSV season is likely COVID related.

“All community-associated respiratory viral infections are out of whack because of the pandemic, and all the masking and social distancing that was occurring,” he said.

This may also explain why older kids are coming down with more severe cases of RSV.

“Some children are getting RSV for the first time as older children,” Dr. Blumberg said, noting that, historically, most children were infected in the first 2 years of life. “There are reports of children 3 or 4 years of age being admitted with their first episode of RSV because of the [COVID] pandemic.”

This year’s RSV season is also notable for arriving early, potentially catching the community off guard, according to Jennifer D. Kusma, MD, a primary care pediatrician at Ann & Robert H. Lurie Children’s Hospital of Chicago.

“People who should have been protected often weren’t protected yet,” Dr. Kusma said in an interview.
 

Treatments new, old, and unproven

On Nov. 17, in the midst of the RSV surge, the American Academy of Pediatrics issued updated guidance for palivizumab, an RSV-targeting monoclonal antibody labeled for children at risk of severe RSV, including those with pre-existing lung or heart conditions, and infants with a history of premature birth (less than or equal to 35 weeks’ gestational age).

“If RSV disease activity persists at high levels in a given region through the fall and winter, the AAP supports providing more than five consecutive doses of palivizumab to eligible children,” the update stated.

Insurance companies appear to be responding in kind, covering additional doses for children in need.

“[Payers] have agreed that, if [palivizumab] needs to be given for an additional month or 2 or 3, then they’re making a commitment that they’ll reimburse hospitals for providing that,” Dr. Blumberg said.

For ineligible patients, such as Sebastian, who was born prematurely at 36 weeks – 1 week shy of the label requirement – treatment relies upon supportive care with oxygen and IV fluids.

At home, parents are left with simpler options.

Dr. Blumberg and Dr. Kusma recommended keeping children hydrated, maintaining humidified air, and using saline nose drops with bulb suction to clear mucus.

In the Witts’ experience, that last step may be easier said than done.

“Every time a nurse would walk into the room, Sebastian would yell: ‘Go away, doctor! I don’t want snot sucker!’” Mr. Witt said.

“If you over snot-suck, that’s really uncomfortable for the kid, and really hard for you,” Ms. Witt said. “And it doesn’t make much of a difference. It’s just very hard to find a middle ground, where you’re helping and keeping them comfortable.”

Some parents are turning to novel strategies, such as nebulized hypertonic saline, currently marketed on Amazon for children with RSV.

Although the AAP offers a weak recommendation for nebulized hypertonic saline in children hospitalized more than 72 hours, they advise against it in the emergency setting, citing inconsistent findings in clinical trials.

To any parents tempted by thousands of positive Amazon reviews, Dr. Blumberg said, “I wouldn’t waste my money on that.”

Dr. Kusma agreed.

“[Nebulized hypertonic saline] can be irritating,” she said. “It’s saltwater, essentially. If a parent is in the position where they’re worried about their child’s breathing to the point that they think they need to use it, I would err on the side of calling your pediatrician and being seen.”
 

Going in, coming home

Dr. Kusma said parents should seek medical attention if a child is breathing faster and working harder to get air. Increased work of breathing is characterized by pulling of the skin at the notch where the throat meets the chest bone (tracheal tugging), and flattening of the belly that makes the ribcage more prominent.

Mr. Witt saw these signs in Sebastian. He knew they were significant, because a friend who is a nurse had previously shown him some examples of children who exhibited these symptoms online.

“That’s how I knew that things were actually really dangerous,” Mr. Witt said. “Had she not shown me those videos a month and a half before this happened, I don’t know that we would have hit the alarm bell as quickly as we did.”

After spending their second night and the following day in a cramped preoperative room converted to manage overflow from the emergency department, Sebastian’s condition improved, and he was discharged. The Witts are relieved to be home, but frustrations from their ordeal remain, especially considering the estimated $5,000 in out-of-pocket costs they expect to pay.

“How is this our health care system?” Ms. Witt asked. “This is unbelievable.”
 

An optimistic outlook

RSV seasons typically demonstrate a clear peak, followed by a decline through the rest of the season, suggesting better times lie ahead; however, this season has been anything but typical.

“I’m hopeful that it will just go away and stay away,” Dr. Kusma said, citing this trend. “But I can’t know for sure.”

To anxious parents, Dr. Blumberg offered an optimistic view of RSV seasons to come.

“There’s hope,” he said. “There are vaccines that are being developed that are very close to FDA approval. So, it’s possible that this time next year, we might have widespread RSV vaccination available for children so that we don’t have to go through this nightmare again.”

Dr. Blumberg and Dr. Kusma disclosed no relevant conflicts of interest.

There has been no ebb in the flurry of respiratory illnesses infecting America’s youngest children. More pediatric wards across the country are announcing crises as beds reach capacity, the pediatric death toll jumped significantly in the past week, and sometimes children are being infected with more than one virus at a time.

In Oregon, for example, the governor announced an official state of emergency to help hospitals deal with the surge of respiratory viruses. Doernbecher Children’s Hospital in Portland, which houses half of all pediatric ICU beds statewide, moved to “crisis mode” and said every pediatric ICU bed was full, Oregon Public Broadcasting reported.

Last month, pediatricians nationwide called for a similar emergency declaration from the federal government to help them respond to the wave of illnesses, which include influenza and respiratory syncytial virus (RSV).

“What’s concerning to us are not only the number of infections, but the severity of these infections, leading to a high number of emergency room visits and hospitalizations,” pediatric infectious disease expert Oscar G. Gómez-Duarte, MD, PhD, said in a news release.

Five more pediatric deaths due to the flu were logged by the CDC in the past week, bringing the total for pediatric flu deaths this season to 12. Nearly 21 per 100,000 children ages 4 and under are being hospitalized for the flu, which is double the rate for children ages 5-17. Last year at this time, fewer than 1 child under age 4 per 100,000 were being hospitalized for the flu.

RSV rates are also stunningly high.

“If we look at CDC data, the RSV hospitalization rate is 10 times higher than usual for this point in the season,” American Medical Association Vice President Andrea Garcia, JD, said in this week’s AMA podcast. “And 171 out of every 100,000 infants younger than 6 months were hospitalized with RSV for the week ending Nov. 12. That is more than double the RSV hospitalization rate for newborns last year and seven times the rate in 2018, which is the last complete season we saw before the pandemic.”

Dr. Gómez-Duarte said hospitals are admitting children with respiratory illnesses who had otherwise been healthy, and sometimes they are even seeing patients with more than one illness.

“Yes, some children are getting what we call coinfections, where they become infected with more than one virus at a time. In some instances, a child becomes initially infected with flu, begins to recover, and subsequently comes down with rhinovirus (a common cold virus), RSV, or any other respiratory virus,” he said. “These coinfections tend to be more severe than when the child just has one infection.”

A version of this article first appeared on Medscape.com.

There has been no ebb in the flurry of respiratory illnesses infecting America’s youngest children. More pediatric wards across the country are announcing crises as beds reach capacity, the pediatric death toll jumped significantly in the past week, and sometimes children are being infected with more than one virus at a time.

In Oregon, for example, the governor announced an official state of emergency to help hospitals deal with the surge of respiratory viruses. Doernbecher Children’s Hospital in Portland, which houses half of all pediatric ICU beds statewide, moved to “crisis mode” and said every pediatric ICU bed was full, Oregon Public Broadcasting reported.

Last month, pediatricians nationwide called for a similar emergency declaration from the federal government to help them respond to the wave of illnesses, which include influenza and respiratory syncytial virus (RSV).

“What’s concerning to us are not only the number of infections, but the severity of these infections, leading to a high number of emergency room visits and hospitalizations,” pediatric infectious disease expert Oscar G. Gómez-Duarte, MD, PhD, said in a news release.

Five more pediatric deaths due to the flu were logged by the CDC in the past week, bringing the total for pediatric flu deaths this season to 12. Nearly 21 per 100,000 children ages 4 and under are being hospitalized for the flu, which is double the rate for children ages 5-17. Last year at this time, fewer than 1 child under age 4 per 100,000 were being hospitalized for the flu.

RSV rates are also stunningly high.

“If we look at CDC data, the RSV hospitalization rate is 10 times higher than usual for this point in the season,” American Medical Association Vice President Andrea Garcia, JD, said in this week’s AMA podcast. “And 171 out of every 100,000 infants younger than 6 months were hospitalized with RSV for the week ending Nov. 12. That is more than double the RSV hospitalization rate for newborns last year and seven times the rate in 2018, which is the last complete season we saw before the pandemic.”

Dr. Gómez-Duarte said hospitals are admitting children with respiratory illnesses who had otherwise been healthy, and sometimes they are even seeing patients with more than one illness.

“Yes, some children are getting what we call coinfections, where they become infected with more than one virus at a time. In some instances, a child becomes initially infected with flu, begins to recover, and subsequently comes down with rhinovirus (a common cold virus), RSV, or any other respiratory virus,” he said. “These coinfections tend to be more severe than when the child just has one infection.”

A version of this article first appeared on Medscape.com.

There has been no ebb in the flurry of respiratory illnesses infecting America’s youngest children. More pediatric wards across the country are announcing crises as beds reach capacity, the pediatric death toll jumped significantly in the past week, and sometimes children are being infected with more than one virus at a time.

In Oregon, for example, the governor announced an official state of emergency to help hospitals deal with the surge of respiratory viruses. Doernbecher Children’s Hospital in Portland, which houses half of all pediatric ICU beds statewide, moved to “crisis mode” and said every pediatric ICU bed was full, Oregon Public Broadcasting reported.

Last month, pediatricians nationwide called for a similar emergency declaration from the federal government to help them respond to the wave of illnesses, which include influenza and respiratory syncytial virus (RSV).

“What’s concerning to us are not only the number of infections, but the severity of these infections, leading to a high number of emergency room visits and hospitalizations,” pediatric infectious disease expert Oscar G. Gómez-Duarte, MD, PhD, said in a news release.

Five more pediatric deaths due to the flu were logged by the CDC in the past week, bringing the total for pediatric flu deaths this season to 12. Nearly 21 per 100,000 children ages 4 and under are being hospitalized for the flu, which is double the rate for children ages 5-17. Last year at this time, fewer than 1 child under age 4 per 100,000 were being hospitalized for the flu.

RSV rates are also stunningly high.

“If we look at CDC data, the RSV hospitalization rate is 10 times higher than usual for this point in the season,” American Medical Association Vice President Andrea Garcia, JD, said in this week’s AMA podcast. “And 171 out of every 100,000 infants younger than 6 months were hospitalized with RSV for the week ending Nov. 12. That is more than double the RSV hospitalization rate for newborns last year and seven times the rate in 2018, which is the last complete season we saw before the pandemic.”

Dr. Gómez-Duarte said hospitals are admitting children with respiratory illnesses who had otherwise been healthy, and sometimes they are even seeing patients with more than one illness.

“Yes, some children are getting what we call coinfections, where they become infected with more than one virus at a time. In some instances, a child becomes initially infected with flu, begins to recover, and subsequently comes down with rhinovirus (a common cold virus), RSV, or any other respiratory virus,” he said. “These coinfections tend to be more severe than when the child just has one infection.”

A version of this article first appeared on Medscape.com.

COVID-19 vaccines retained the ability to prevent deaths from COVID-19 in children and adolescents regardless of the dominant circulating variant, in a new study.

The vaccine’s effectiveness against infection in the short term has been established, as has the waning effectiveness of the vaccine over time, wrote Juan Manuel Castelli, MD, of the Ministry of Health of Argentina, Buenos Aires, and colleagues, in the British Medical Journal.

However, data on the impact of vaccine effectiveness on mortality in children and adolescents are limited, especially during periods of omicron variant dominance, the researchers said.

In their new study, the researchers reviewed data from 844,460 children and adolescents aged 3-17 years from the National Surveillance System and the Nominalized Federal Vaccination Registry of Argentina, during a time that included a period of omicron dominance.

Argentina began vaccinating adolescents aged 12-17 years against COVID-19 in August 2021 and added children aged 3-11 years in October 2021. Those aged 12-17 years who were considered fully vaccinated received two doses of either Pfizer-BioNTech and/or Moderna vaccines, and fully-vaccinated 3- to 11-year-olds received two doses of Sinopharm vaccine.

The average time from the second vaccine dose to a COVID-19 test was 66 days for those aged 12-17 years and 54 days for 3- to 11-year-olds. The researchers matched COVID-19 cases with uninfected controls, and a total of 139,321 cases were included in the analysis.

Overall, the estimated vaccine effectiveness against COVID-19 was 64.2% during a period of delta dominance (61.2% in children aged 3-11 years and 66.8% in adolescents aged 12-17 years).

During a period of omicron dominance, estimated vaccine effectiveness was 19.9% across all ages (15.9% and 26.0% for younger and older age groups, respectively).

Effectiveness of the vaccine decreased over time, regardless of the dominant variant, but the decline was greater during the omicron dominant period, the researchers noted. During the omicron period, effectiveness in children aged 3-11 years decreased from 37.6% at 15-30 days postvaccination to 2.0% at 60 days or longer after vaccination. In adolescents aged 12-17 years, vaccine effectiveness during the omicron period decreased from 55.8% at 15-30 days postvaccination to 12.4% at 60 days or longer after vaccination.

Despite the waning protection against infection, the vaccine’s effectiveness against death from COVID-19 was 66.9% in children aged 3-11 years and 97.6% in adolescents aged 12-17 during the period of omicron dominance, the researchers noted.

The results are consistent with similar studies showing a decreased vaccine effectiveness against infection but a persistent effectiveness against deaths over time, the researchers wrote in the discussion section of their paper.

“Our results suggest that the primary vaccination schedule is effective in preventing mortality in children and adolescents with COVID-19 regardless of the circulating SARS-CoV-2 variant,” the researchers said.
 

Study limitations and strengths

The study was limited by several factors including the incomplete data on symptoms and hospital admissions, the possible impact of unmeasured confounding variables, and the observational design that prevents conclusions of causality, the researchers noted. However, the results were strengthened by the large sample size and access to detailed vaccination records, they said.

Both heterologous and homologous mRNA vaccine schedules showed similar effectiveness in preventing short-term infection and mortality from COVID-19 during periods of differing dominant variants, they noted.

The study findings support the vaccination of children against COVID-19 as an important public health measure to prevent mortality in children and adolescents, they concluded.
 

Data support value of vaccination, outside experts say

“COVID vaccines may not be as effective over time as the gene variants in the SARS-CoV-2 virus change,” Adrienne G. Randolph, MD, a pediatrician at Harvard Medical School and Boston Children’s Hospital, said in an interview. “Therefore, it is essential to assess vaccine effectiveness over time to look at effectiveness against variants and duration of effectiveness.” Dr. Randolph, who was not involved in the study, said she was not surprised by the findings, which she described as consistent with data from the United States. “COVID vaccines are very effective against preventing life-threatening disease, but the effectiveness against less severe illness for COVID vaccines is not as effective against Omicron,” she noted. 

The take-home message for clinicians is that it’s important to get children vaccinated against COVID to prevent severe and life-threatening illness, said Dr. Randolph. “Although these cases are uncommon in children, it is not possible to predict which children will be the most severely affected by COVID,” she emphasized.

However, “we need more data on the new COVID booster vaccines in children that are designed to be more effective against Omicron’s newer variants,” Dr. Randolph said in an interview. “We also need more data on COVID vaccine effectiveness in the youngest children, under 5 years of age, and data on vaccinating mothers to prevent COVID in infants,” she said.

Tim Joos, MD, a Seattle-based clinician who practices a combination of internal medicine and pediatrics, agreed that future research should continue to assess how the new COVID boosters are faring against new variants, noting that the current study did not include data from children who received the new bivalent vaccine.

“The methodology of this study uses a test negative case control design which is common for estimating vaccine effectiveness post-release of a vaccine, but is subject to biases,” Dr. Joos explained. “These are not the clean effectiveness numbers of the prospective randomized control trials that we are used to hearing about when a vaccine is first being approved.”

“Nevertheless, the study reinforces the initial manufacturers’ studies that the vaccines are effective at preventing infection in the pediatric population,” Dr. Joos said in an interview. The current study also reinforces the effectiveness of vaccines in preventing “the rare but devastating mortality from COVID-19 in the pediatric population.”

Commenting on other research showing an increasing ratio of COVID deaths among vaccinated individuals compared to total COVID deaths, he noted that this finding is “likely reflecting a denominator effect of rapidly declining COVID deaths overall,” partly from the vaccines and partly from immunity after previous natural infection.

The study received no outside funding. The researchers, Dr. Randolph, and Dr. Joos had no financial conflicts to disclose. Dr. Joos serves on the Editorial Advisory Board of Pediatric News.

COVID-19 vaccines retained the ability to prevent deaths from COVID-19 in children and adolescents regardless of the dominant circulating variant, in a new study.

The vaccine’s effectiveness against infection in the short term has been established, as has the waning effectiveness of the vaccine over time, wrote Juan Manuel Castelli, MD, of the Ministry of Health of Argentina, Buenos Aires, and colleagues, in the British Medical Journal.

However, data on the impact of vaccine effectiveness on mortality in children and adolescents are limited, especially during periods of omicron variant dominance, the researchers said.

In their new study, the researchers reviewed data from 844,460 children and adolescents aged 3-17 years from the National Surveillance System and the Nominalized Federal Vaccination Registry of Argentina, during a time that included a period of omicron dominance.

Argentina began vaccinating adolescents aged 12-17 years against COVID-19 in August 2021 and added children aged 3-11 years in October 2021. Those aged 12-17 years who were considered fully vaccinated received two doses of either Pfizer-BioNTech and/or Moderna vaccines, and fully-vaccinated 3- to 11-year-olds received two doses of Sinopharm vaccine.

The average time from the second vaccine dose to a COVID-19 test was 66 days for those aged 12-17 years and 54 days for 3- to 11-year-olds. The researchers matched COVID-19 cases with uninfected controls, and a total of 139,321 cases were included in the analysis.

Overall, the estimated vaccine effectiveness against COVID-19 was 64.2% during a period of delta dominance (61.2% in children aged 3-11 years and 66.8% in adolescents aged 12-17 years).

During a period of omicron dominance, estimated vaccine effectiveness was 19.9% across all ages (15.9% and 26.0% for younger and older age groups, respectively).

Effectiveness of the vaccine decreased over time, regardless of the dominant variant, but the decline was greater during the omicron dominant period, the researchers noted. During the omicron period, effectiveness in children aged 3-11 years decreased from 37.6% at 15-30 days postvaccination to 2.0% at 60 days or longer after vaccination. In adolescents aged 12-17 years, vaccine effectiveness during the omicron period decreased from 55.8% at 15-30 days postvaccination to 12.4% at 60 days or longer after vaccination.

Despite the waning protection against infection, the vaccine’s effectiveness against death from COVID-19 was 66.9% in children aged 3-11 years and 97.6% in adolescents aged 12-17 during the period of omicron dominance, the researchers noted.

The results are consistent with similar studies showing a decreased vaccine effectiveness against infection but a persistent effectiveness against deaths over time, the researchers wrote in the discussion section of their paper.

“Our results suggest that the primary vaccination schedule is effective in preventing mortality in children and adolescents with COVID-19 regardless of the circulating SARS-CoV-2 variant,” the researchers said.
 

Study limitations and strengths

The study was limited by several factors including the incomplete data on symptoms and hospital admissions, the possible impact of unmeasured confounding variables, and the observational design that prevents conclusions of causality, the researchers noted. However, the results were strengthened by the large sample size and access to detailed vaccination records, they said.

Both heterologous and homologous mRNA vaccine schedules showed similar effectiveness in preventing short-term infection and mortality from COVID-19 during periods of differing dominant variants, they noted.

The study findings support the vaccination of children against COVID-19 as an important public health measure to prevent mortality in children and adolescents, they concluded.
 

Data support value of vaccination, outside experts say

“COVID vaccines may not be as effective over time as the gene variants in the SARS-CoV-2 virus change,” Adrienne G. Randolph, MD, a pediatrician at Harvard Medical School and Boston Children’s Hospital, said in an interview. “Therefore, it is essential to assess vaccine effectiveness over time to look at effectiveness against variants and duration of effectiveness.” Dr. Randolph, who was not involved in the study, said she was not surprised by the findings, which she described as consistent with data from the United States. “COVID vaccines are very effective against preventing life-threatening disease, but the effectiveness against less severe illness for COVID vaccines is not as effective against Omicron,” she noted. 

The take-home message for clinicians is that it’s important to get children vaccinated against COVID to prevent severe and life-threatening illness, said Dr. Randolph. “Although these cases are uncommon in children, it is not possible to predict which children will be the most severely affected by COVID,” she emphasized.

However, “we need more data on the new COVID booster vaccines in children that are designed to be more effective against Omicron’s newer variants,” Dr. Randolph said in an interview. “We also need more data on COVID vaccine effectiveness in the youngest children, under 5 years of age, and data on vaccinating mothers to prevent COVID in infants,” she said.

Tim Joos, MD, a Seattle-based clinician who practices a combination of internal medicine and pediatrics, agreed that future research should continue to assess how the new COVID boosters are faring against new variants, noting that the current study did not include data from children who received the new bivalent vaccine.

“The methodology of this study uses a test negative case control design which is common for estimating vaccine effectiveness post-release of a vaccine, but is subject to biases,” Dr. Joos explained. “These are not the clean effectiveness numbers of the prospective randomized control trials that we are used to hearing about when a vaccine is first being approved.”

“Nevertheless, the study reinforces the initial manufacturers’ studies that the vaccines are effective at preventing infection in the pediatric population,” Dr. Joos said in an interview. The current study also reinforces the effectiveness of vaccines in preventing “the rare but devastating mortality from COVID-19 in the pediatric population.”

Commenting on other research showing an increasing ratio of COVID deaths among vaccinated individuals compared to total COVID deaths, he noted that this finding is “likely reflecting a denominator effect of rapidly declining COVID deaths overall,” partly from the vaccines and partly from immunity after previous natural infection.

The study received no outside funding. The researchers, Dr. Randolph, and Dr. Joos had no financial conflicts to disclose. Dr. Joos serves on the Editorial Advisory Board of Pediatric News.

COVID-19 vaccines retained the ability to prevent deaths from COVID-19 in children and adolescents regardless of the dominant circulating variant, in a new study.

The vaccine’s effectiveness against infection in the short term has been established, as has the waning effectiveness of the vaccine over time, wrote Juan Manuel Castelli, MD, of the Ministry of Health of Argentina, Buenos Aires, and colleagues, in the British Medical Journal.

However, data on the impact of vaccine effectiveness on mortality in children and adolescents are limited, especially during periods of omicron variant dominance, the researchers said.

In their new study, the researchers reviewed data from 844,460 children and adolescents aged 3-17 years from the National Surveillance System and the Nominalized Federal Vaccination Registry of Argentina, during a time that included a period of omicron dominance.

Argentina began vaccinating adolescents aged 12-17 years against COVID-19 in August 2021 and added children aged 3-11 years in October 2021. Those aged 12-17 years who were considered fully vaccinated received two doses of either Pfizer-BioNTech and/or Moderna vaccines, and fully-vaccinated 3- to 11-year-olds received two doses of Sinopharm vaccine.

The average time from the second vaccine dose to a COVID-19 test was 66 days for those aged 12-17 years and 54 days for 3- to 11-year-olds. The researchers matched COVID-19 cases with uninfected controls, and a total of 139,321 cases were included in the analysis.

Overall, the estimated vaccine effectiveness against COVID-19 was 64.2% during a period of delta dominance (61.2% in children aged 3-11 years and 66.8% in adolescents aged 12-17 years).

During a period of omicron dominance, estimated vaccine effectiveness was 19.9% across all ages (15.9% and 26.0% for younger and older age groups, respectively).

Effectiveness of the vaccine decreased over time, regardless of the dominant variant, but the decline was greater during the omicron dominant period, the researchers noted. During the omicron period, effectiveness in children aged 3-11 years decreased from 37.6% at 15-30 days postvaccination to 2.0% at 60 days or longer after vaccination. In adolescents aged 12-17 years, vaccine effectiveness during the omicron period decreased from 55.8% at 15-30 days postvaccination to 12.4% at 60 days or longer after vaccination.

Despite the waning protection against infection, the vaccine’s effectiveness against death from COVID-19 was 66.9% in children aged 3-11 years and 97.6% in adolescents aged 12-17 during the period of omicron dominance, the researchers noted.

The results are consistent with similar studies showing a decreased vaccine effectiveness against infection but a persistent effectiveness against deaths over time, the researchers wrote in the discussion section of their paper.

“Our results suggest that the primary vaccination schedule is effective in preventing mortality in children and adolescents with COVID-19 regardless of the circulating SARS-CoV-2 variant,” the researchers said.
 

Study limitations and strengths

The study was limited by several factors including the incomplete data on symptoms and hospital admissions, the possible impact of unmeasured confounding variables, and the observational design that prevents conclusions of causality, the researchers noted. However, the results were strengthened by the large sample size and access to detailed vaccination records, they said.

Both heterologous and homologous mRNA vaccine schedules showed similar effectiveness in preventing short-term infection and mortality from COVID-19 during periods of differing dominant variants, they noted.

The study findings support the vaccination of children against COVID-19 as an important public health measure to prevent mortality in children and adolescents, they concluded.
 

Data support value of vaccination, outside experts say

“COVID vaccines may not be as effective over time as the gene variants in the SARS-CoV-2 virus change,” Adrienne G. Randolph, MD, a pediatrician at Harvard Medical School and Boston Children’s Hospital, said in an interview. “Therefore, it is essential to assess vaccine effectiveness over time to look at effectiveness against variants and duration of effectiveness.” Dr. Randolph, who was not involved in the study, said she was not surprised by the findings, which she described as consistent with data from the United States. “COVID vaccines are very effective against preventing life-threatening disease, but the effectiveness against less severe illness for COVID vaccines is not as effective against Omicron,” she noted. 

The take-home message for clinicians is that it’s important to get children vaccinated against COVID to prevent severe and life-threatening illness, said Dr. Randolph. “Although these cases are uncommon in children, it is not possible to predict which children will be the most severely affected by COVID,” she emphasized.

However, “we need more data on the new COVID booster vaccines in children that are designed to be more effective against Omicron’s newer variants,” Dr. Randolph said in an interview. “We also need more data on COVID vaccine effectiveness in the youngest children, under 5 years of age, and data on vaccinating mothers to prevent COVID in infants,” she said.

Tim Joos, MD, a Seattle-based clinician who practices a combination of internal medicine and pediatrics, agreed that future research should continue to assess how the new COVID boosters are faring against new variants, noting that the current study did not include data from children who received the new bivalent vaccine.

“The methodology of this study uses a test negative case control design which is common for estimating vaccine effectiveness post-release of a vaccine, but is subject to biases,” Dr. Joos explained. “These are not the clean effectiveness numbers of the prospective randomized control trials that we are used to hearing about when a vaccine is first being approved.”

“Nevertheless, the study reinforces the initial manufacturers’ studies that the vaccines are effective at preventing infection in the pediatric population,” Dr. Joos said in an interview. The current study also reinforces the effectiveness of vaccines in preventing “the rare but devastating mortality from COVID-19 in the pediatric population.”

Commenting on other research showing an increasing ratio of COVID deaths among vaccinated individuals compared to total COVID deaths, he noted that this finding is “likely reflecting a denominator effect of rapidly declining COVID deaths overall,” partly from the vaccines and partly from immunity after previous natural infection.

The study received no outside funding. The researchers, Dr. Randolph, and Dr. Joos had no financial conflicts to disclose. Dr. Joos serves on the Editorial Advisory Board of Pediatric News.