Vaccines

When 23 frail elderly patients in Norway died in early 2021 shortly after they had received an mRNA-based vaccine against COVID-19, Norwegian health authorities cautioned physicians to conduct more thorough assessments of patients prior to immunization, and launched an investigation into the safety of the BNT162b2 vaccine (Comirnaty; Pfizer-BioNTech).

Now, the results of that investigation and of a subsequent larger study of nursing home residents in Norway have shown no increased risk for short-term mortality following COVID-19 vaccination in the overall population of elderly patients. The new research also showed clear evidence of a survival benefit compared with the unvaccinated population, Anette Hylen Ranhoff, MD, PhD, said at the annual meeting of the European Geriatric Medicine Society, held in a hybrid format in Athens, Greece, and online.

“We found no evidence of increased short-term mortality among vaccinated older individuals, and particularly not among the nursing home patients,” said Dr. Ranhoff, a senior researcher at the Norwegian Institute of Public Health and professor at University of Bergen, Norway. “But we think that this [lower] mortality risk was most likely a sort of ‘healthy-vaccinee’ effect, which means that people who were a bit more healthy were vaccinated, and not those who were the very, very most frail.”

“We have more or less the same data in France about events, with very high rates of vaccination,” said session moderator Athanase Benetos MD, PhD, professor and chairman of geriatric medicine at the University Hospital of Nancy in France, who was not involved in the study.

“In my department, a month after the end of the vaccination and at the same time while the pandemic in the city was going up, we had a 90% decrease in mortality from COVID in the nursing homes,” he told Dr. Ranhoff.
 

Potential risks

Frail elderly patients were not included in clinical trials of COVID-19 vaccines, and although previous studies have shown a low incidence of local or systemic reactions to vaccination among older people, “we think that quite mild adverse events following vaccination could trigger and destabilize a frail person,” Dr. Ranhoff said.

As reported Jan. 15, 2021, in BMJ, investigation by the Norwegian Medicines Agency (NOMA) into 13 of the 23 reported cases concluded that common adverse reactions associated with mRNA vaccines could have contributed to the deaths of some of the frail elderly patients

Steinar Madsen, MD, NOMA medical director, told BMJ “we are not alarmed or worried about this, because these are very rare occurrences and they occurred in very frail patients with very serious disease.”
 

Health authorities investigate

In response to the report and at the request of the Norwegian Public Health Institute and NOMA, Dr. Ranhoff and colleagues investigated the first 100 deaths among nursing-home residents who received the vaccine. The team consisted of three geriatricians and an infectious disease specialist who sees patients in nursing homes.

They looked at each patient’s clinical course before and after vaccination, their health trajectory and life expectancy at the time of vaccination, new symptoms following vaccination, and the time from vaccination to new symptoms and to death.

In addition, the investigators evaluated Clinical Frailty Scale (CFS) scores for each patient. CFS scores range from 1 (very fit) to 9 (terminally ill, with a life expectancy of less than 6 months who are otherwise evidently frail).

The initial investigation found that among 95 evaluable patients, the association between vaccination and death was “probable” in 10, “possible” in 26, and “unlikely” in 59.

The mean time from vaccination to symptoms was 1.4 days in the probable cases, 2.5 days in the possible cases, and 4.7 days in the unlikely cases.

The mean time from vaccination to death was 3.1, 8.3, and 8.2 days, respectively.

In all three categories, the patients had mean CFS scores ranging from 7.6 to 7.9, putting them in the “severely frail” category, defined as people who are completely dependent for personal care but seem stable and not at high risk for dying.

“We have quite many nursing home residents in Norway, 35,000; more than 80% have dementia, and the mean age is 85 years. We know that approximately 45 people die every day in these nursing homes, and their mean age of death is 87.5 years,” Dr. Ranhoff said.
 

Population-wide study

Dr. Ranhoff and colleagues also looked more broadly into the question of potential vaccine-related mortality in the total population of older people in Norway from the day of vaccination to follow-up at 3 weeks.

They conducted a matched cohort study to investigate the relationship between the mRNA SARS-CoV-2 vaccine and overall death among persons aged 65 and older in the general population, and across four groups: patients receiving home-based care, long-term nursing home patients, short-term nursing home patients, and those not receiving health services.

The researchers identified a total of 967,786 residents of Norway aged 65 and over at the start of the country’s vaccination campaign at the end of December, 2020, and they matched vaccinated individuals with unvaccinated persons based on demographic, geographic, and clinical risk group factors.

Dr. Ranhoff showed Kaplan-Meier survival curves for the total population and for each of the health-service states. In all cases there was a clear survival benefit for vaccinated vs. unvaccinated patients. She did not, however, provide specific numbers or hazard ratios for the differences between vaccinated and unvaccinated individuals in each of the comparisons.

The study was supported by the Norwegian Institute of Public Health. Dr. Ranhoff and Dr. Benetos reported no conflicts of interest.

When 23 frail elderly patients in Norway died in early 2021 shortly after they had received an mRNA-based vaccine against COVID-19, Norwegian health authorities cautioned physicians to conduct more thorough assessments of patients prior to immunization, and launched an investigation into the safety of the BNT162b2 vaccine (Comirnaty; Pfizer-BioNTech).

Now, the results of that investigation and of a subsequent larger study of nursing home residents in Norway have shown no increased risk for short-term mortality following COVID-19 vaccination in the overall population of elderly patients. The new research also showed clear evidence of a survival benefit compared with the unvaccinated population, Anette Hylen Ranhoff, MD, PhD, said at the annual meeting of the European Geriatric Medicine Society, held in a hybrid format in Athens, Greece, and online.

“We found no evidence of increased short-term mortality among vaccinated older individuals, and particularly not among the nursing home patients,” said Dr. Ranhoff, a senior researcher at the Norwegian Institute of Public Health and professor at University of Bergen, Norway. “But we think that this [lower] mortality risk was most likely a sort of ‘healthy-vaccinee’ effect, which means that people who were a bit more healthy were vaccinated, and not those who were the very, very most frail.”

“We have more or less the same data in France about events, with very high rates of vaccination,” said session moderator Athanase Benetos MD, PhD, professor and chairman of geriatric medicine at the University Hospital of Nancy in France, who was not involved in the study.

“In my department, a month after the end of the vaccination and at the same time while the pandemic in the city was going up, we had a 90% decrease in mortality from COVID in the nursing homes,” he told Dr. Ranhoff.
 

Potential risks

Frail elderly patients were not included in clinical trials of COVID-19 vaccines, and although previous studies have shown a low incidence of local or systemic reactions to vaccination among older people, “we think that quite mild adverse events following vaccination could trigger and destabilize a frail person,” Dr. Ranhoff said.

As reported Jan. 15, 2021, in BMJ, investigation by the Norwegian Medicines Agency (NOMA) into 13 of the 23 reported cases concluded that common adverse reactions associated with mRNA vaccines could have contributed to the deaths of some of the frail elderly patients

Steinar Madsen, MD, NOMA medical director, told BMJ “we are not alarmed or worried about this, because these are very rare occurrences and they occurred in very frail patients with very serious disease.”
 

Health authorities investigate

In response to the report and at the request of the Norwegian Public Health Institute and NOMA, Dr. Ranhoff and colleagues investigated the first 100 deaths among nursing-home residents who received the vaccine. The team consisted of three geriatricians and an infectious disease specialist who sees patients in nursing homes.

They looked at each patient’s clinical course before and after vaccination, their health trajectory and life expectancy at the time of vaccination, new symptoms following vaccination, and the time from vaccination to new symptoms and to death.

In addition, the investigators evaluated Clinical Frailty Scale (CFS) scores for each patient. CFS scores range from 1 (very fit) to 9 (terminally ill, with a life expectancy of less than 6 months who are otherwise evidently frail).

The initial investigation found that among 95 evaluable patients, the association between vaccination and death was “probable” in 10, “possible” in 26, and “unlikely” in 59.

The mean time from vaccination to symptoms was 1.4 days in the probable cases, 2.5 days in the possible cases, and 4.7 days in the unlikely cases.

The mean time from vaccination to death was 3.1, 8.3, and 8.2 days, respectively.

In all three categories, the patients had mean CFS scores ranging from 7.6 to 7.9, putting them in the “severely frail” category, defined as people who are completely dependent for personal care but seem stable and not at high risk for dying.

“We have quite many nursing home residents in Norway, 35,000; more than 80% have dementia, and the mean age is 85 years. We know that approximately 45 people die every day in these nursing homes, and their mean age of death is 87.5 years,” Dr. Ranhoff said.
 

Population-wide study

Dr. Ranhoff and colleagues also looked more broadly into the question of potential vaccine-related mortality in the total population of older people in Norway from the day of vaccination to follow-up at 3 weeks.

They conducted a matched cohort study to investigate the relationship between the mRNA SARS-CoV-2 vaccine and overall death among persons aged 65 and older in the general population, and across four groups: patients receiving home-based care, long-term nursing home patients, short-term nursing home patients, and those not receiving health services.

The researchers identified a total of 967,786 residents of Norway aged 65 and over at the start of the country’s vaccination campaign at the end of December, 2020, and they matched vaccinated individuals with unvaccinated persons based on demographic, geographic, and clinical risk group factors.

Dr. Ranhoff showed Kaplan-Meier survival curves for the total population and for each of the health-service states. In all cases there was a clear survival benefit for vaccinated vs. unvaccinated patients. She did not, however, provide specific numbers or hazard ratios for the differences between vaccinated and unvaccinated individuals in each of the comparisons.

The study was supported by the Norwegian Institute of Public Health. Dr. Ranhoff and Dr. Benetos reported no conflicts of interest.

When 23 frail elderly patients in Norway died in early 2021 shortly after they had received an mRNA-based vaccine against COVID-19, Norwegian health authorities cautioned physicians to conduct more thorough assessments of patients prior to immunization, and launched an investigation into the safety of the BNT162b2 vaccine (Comirnaty; Pfizer-BioNTech).

Now, the results of that investigation and of a subsequent larger study of nursing home residents in Norway have shown no increased risk for short-term mortality following COVID-19 vaccination in the overall population of elderly patients. The new research also showed clear evidence of a survival benefit compared with the unvaccinated population, Anette Hylen Ranhoff, MD, PhD, said at the annual meeting of the European Geriatric Medicine Society, held in a hybrid format in Athens, Greece, and online.

“We found no evidence of increased short-term mortality among vaccinated older individuals, and particularly not among the nursing home patients,” said Dr. Ranhoff, a senior researcher at the Norwegian Institute of Public Health and professor at University of Bergen, Norway. “But we think that this [lower] mortality risk was most likely a sort of ‘healthy-vaccinee’ effect, which means that people who were a bit more healthy were vaccinated, and not those who were the very, very most frail.”

“We have more or less the same data in France about events, with very high rates of vaccination,” said session moderator Athanase Benetos MD, PhD, professor and chairman of geriatric medicine at the University Hospital of Nancy in France, who was not involved in the study.

“In my department, a month after the end of the vaccination and at the same time while the pandemic in the city was going up, we had a 90% decrease in mortality from COVID in the nursing homes,” he told Dr. Ranhoff.
 

Potential risks

Frail elderly patients were not included in clinical trials of COVID-19 vaccines, and although previous studies have shown a low incidence of local or systemic reactions to vaccination among older people, “we think that quite mild adverse events following vaccination could trigger and destabilize a frail person,” Dr. Ranhoff said.

As reported Jan. 15, 2021, in BMJ, investigation by the Norwegian Medicines Agency (NOMA) into 13 of the 23 reported cases concluded that common adverse reactions associated with mRNA vaccines could have contributed to the deaths of some of the frail elderly patients

Steinar Madsen, MD, NOMA medical director, told BMJ “we are not alarmed or worried about this, because these are very rare occurrences and they occurred in very frail patients with very serious disease.”
 

Health authorities investigate

In response to the report and at the request of the Norwegian Public Health Institute and NOMA, Dr. Ranhoff and colleagues investigated the first 100 deaths among nursing-home residents who received the vaccine. The team consisted of three geriatricians and an infectious disease specialist who sees patients in nursing homes.

They looked at each patient’s clinical course before and after vaccination, their health trajectory and life expectancy at the time of vaccination, new symptoms following vaccination, and the time from vaccination to new symptoms and to death.

In addition, the investigators evaluated Clinical Frailty Scale (CFS) scores for each patient. CFS scores range from 1 (very fit) to 9 (terminally ill, with a life expectancy of less than 6 months who are otherwise evidently frail).

The initial investigation found that among 95 evaluable patients, the association between vaccination and death was “probable” in 10, “possible” in 26, and “unlikely” in 59.

The mean time from vaccination to symptoms was 1.4 days in the probable cases, 2.5 days in the possible cases, and 4.7 days in the unlikely cases.

The mean time from vaccination to death was 3.1, 8.3, and 8.2 days, respectively.

In all three categories, the patients had mean CFS scores ranging from 7.6 to 7.9, putting them in the “severely frail” category, defined as people who are completely dependent for personal care but seem stable and not at high risk for dying.

“We have quite many nursing home residents in Norway, 35,000; more than 80% have dementia, and the mean age is 85 years. We know that approximately 45 people die every day in these nursing homes, and their mean age of death is 87.5 years,” Dr. Ranhoff said.
 

Population-wide study

Dr. Ranhoff and colleagues also looked more broadly into the question of potential vaccine-related mortality in the total population of older people in Norway from the day of vaccination to follow-up at 3 weeks.

They conducted a matched cohort study to investigate the relationship between the mRNA SARS-CoV-2 vaccine and overall death among persons aged 65 and older in the general population, and across four groups: patients receiving home-based care, long-term nursing home patients, short-term nursing home patients, and those not receiving health services.

The researchers identified a total of 967,786 residents of Norway aged 65 and over at the start of the country’s vaccination campaign at the end of December, 2020, and they matched vaccinated individuals with unvaccinated persons based on demographic, geographic, and clinical risk group factors.

Dr. Ranhoff showed Kaplan-Meier survival curves for the total population and for each of the health-service states. In all cases there was a clear survival benefit for vaccinated vs. unvaccinated patients. She did not, however, provide specific numbers or hazard ratios for the differences between vaccinated and unvaccinated individuals in each of the comparisons.

The study was supported by the Norwegian Institute of Public Health. Dr. Ranhoff and Dr. Benetos reported no conflicts of interest.

Pfizer asked the FDA on Thursday to expand emergency use authorization of its COVID-19 vaccine to children ages 5 to 11.

The request comes after the drugmaker submitted clinical trial data to the FDA on Sept. 28. Pfizer said the study of 2,268 children showed the vaccine was safe and produced a robust immune response.

Participants in the studies received a lower dose of the vaccine, 10 micrograms. Their response 2 weeks after a second dose was reportedly equal to the immune protection in a control group of 16- to 25-year-olds who received the fully approved 30-microgram doses.

Currently, the Pfizer EUA applies to 12- to 15-year-olds and people eligible for a Pfizer booster shot. The drugmaker received full FDA approval for the vaccine for Americans 16 years and older in August.

The filing for authorization in 5- to 11-year-olds comes as overall cases of COVID-19 in the United States continue to decline. The decrease includes a drop in new cases in children for the fourth consecutive week, according to analysis of data from the American Academy of Pediatrics and the Children’s Hospital Association.

The next step is an FDA decision on whether to expand the current emergency use authorization (EUA) for teenagers to the younger age group.

Timing of any official word from the agency is unknown. But possibly in anticipation of today’s filing, the FDA already scheduled a meeting of its Vaccines and Related Biological Products Advisory Committee for Oct. 25.

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

Pfizer asked the FDA on Thursday to expand emergency use authorization of its COVID-19 vaccine to children ages 5 to 11.

The request comes after the drugmaker submitted clinical trial data to the FDA on Sept. 28. Pfizer said the study of 2,268 children showed the vaccine was safe and produced a robust immune response.

Participants in the studies received a lower dose of the vaccine, 10 micrograms. Their response 2 weeks after a second dose was reportedly equal to the immune protection in a control group of 16- to 25-year-olds who received the fully approved 30-microgram doses.

Currently, the Pfizer EUA applies to 12- to 15-year-olds and people eligible for a Pfizer booster shot. The drugmaker received full FDA approval for the vaccine for Americans 16 years and older in August.

The filing for authorization in 5- to 11-year-olds comes as overall cases of COVID-19 in the United States continue to decline. The decrease includes a drop in new cases in children for the fourth consecutive week, according to analysis of data from the American Academy of Pediatrics and the Children’s Hospital Association.

The next step is an FDA decision on whether to expand the current emergency use authorization (EUA) for teenagers to the younger age group.

Timing of any official word from the agency is unknown. But possibly in anticipation of today’s filing, the FDA already scheduled a meeting of its Vaccines and Related Biological Products Advisory Committee for Oct. 25.

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

Pfizer asked the FDA on Thursday to expand emergency use authorization of its COVID-19 vaccine to children ages 5 to 11.

The request comes after the drugmaker submitted clinical trial data to the FDA on Sept. 28. Pfizer said the study of 2,268 children showed the vaccine was safe and produced a robust immune response.

Participants in the studies received a lower dose of the vaccine, 10 micrograms. Their response 2 weeks after a second dose was reportedly equal to the immune protection in a control group of 16- to 25-year-olds who received the fully approved 30-microgram doses.

Currently, the Pfizer EUA applies to 12- to 15-year-olds and people eligible for a Pfizer booster shot. The drugmaker received full FDA approval for the vaccine for Americans 16 years and older in August.

The filing for authorization in 5- to 11-year-olds comes as overall cases of COVID-19 in the United States continue to decline. The decrease includes a drop in new cases in children for the fourth consecutive week, according to analysis of data from the American Academy of Pediatrics and the Children’s Hospital Association.

The next step is an FDA decision on whether to expand the current emergency use authorization (EUA) for teenagers to the younger age group.

Timing of any official word from the agency is unknown. But possibly in anticipation of today’s filing, the FDA already scheduled a meeting of its Vaccines and Related Biological Products Advisory Committee for Oct. 25.

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

Johnson & Johnson asked the Food and Drug Administration (FDA) on Tuesday to authorize an extra dose of its COVID-19 vaccine as a booster shot.

The company said it filed a request for people ages 18 and older who have received the one-shot vaccine. Johnson & Johnson submitted data for several different booster intervals -- ranging from 2 months to 6 months -- but didn’t formally recommend one to the FDA, The Associated Press reported.

“We’re describing the data to them,” Mathai Mammen, MD, head of global research and development for Janssen, the company’s vaccine division, told CNN.

“The process is not that we asked for a very specific interval -- we’re providing them data and we’re going to be presenting to the committee,” he said. “They’ll take all that into consideration when they ultimately decide on an appropriate interval.”

The FDA’s independent vaccine advisory committee meets next week to review data on booster shots from both Johnson & Johnson and Moderna. It’s the first step in the review process, which then requires approval from leaders at the FDA and Centers for Disease Control and Prevention. If both agencies authorize the extra shots, Americans could receive boosters from Johnson & Johnson and Moderna later this month, the AP reported.

Johnson & Johnson previously released data that showed the vaccine remains highly effective against COVID-19 at least 5 months after vaccination, with 81% efficacy against hospitalizations in the United States.

Two weeks ago, the company reported that a booster dose at 2 months or 6 months further lifted immunity, with a booster at 2 months providing 94% protection against moderate and severe COVID-19. The company said the 6-month booster raised antibodies by 12 times but didn’t release additional data at that time.

In September, the FDA authorized booster shots of the Pfizer vaccine for ages 65 and older, those who live in long-term care facilities, and those with higher risks for contracting COVID-19. The Biden administration is supporting a booster campaign to address potential waning vaccine immunity and remaining surges of the more contagious Delta variant, the AP reported.

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

Johnson & Johnson asked the Food and Drug Administration (FDA) on Tuesday to authorize an extra dose of its COVID-19 vaccine as a booster shot.

The company said it filed a request for people ages 18 and older who have received the one-shot vaccine. Johnson & Johnson submitted data for several different booster intervals -- ranging from 2 months to 6 months -- but didn’t formally recommend one to the FDA, The Associated Press reported.

“We’re describing the data to them,” Mathai Mammen, MD, head of global research and development for Janssen, the company’s vaccine division, told CNN.

“The process is not that we asked for a very specific interval -- we’re providing them data and we’re going to be presenting to the committee,” he said. “They’ll take all that into consideration when they ultimately decide on an appropriate interval.”

The FDA’s independent vaccine advisory committee meets next week to review data on booster shots from both Johnson & Johnson and Moderna. It’s the first step in the review process, which then requires approval from leaders at the FDA and Centers for Disease Control and Prevention. If both agencies authorize the extra shots, Americans could receive boosters from Johnson & Johnson and Moderna later this month, the AP reported.

Johnson & Johnson previously released data that showed the vaccine remains highly effective against COVID-19 at least 5 months after vaccination, with 81% efficacy against hospitalizations in the United States.

Two weeks ago, the company reported that a booster dose at 2 months or 6 months further lifted immunity, with a booster at 2 months providing 94% protection against moderate and severe COVID-19. The company said the 6-month booster raised antibodies by 12 times but didn’t release additional data at that time.

In September, the FDA authorized booster shots of the Pfizer vaccine for ages 65 and older, those who live in long-term care facilities, and those with higher risks for contracting COVID-19. The Biden administration is supporting a booster campaign to address potential waning vaccine immunity and remaining surges of the more contagious Delta variant, the AP reported.

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

Johnson & Johnson asked the Food and Drug Administration (FDA) on Tuesday to authorize an extra dose of its COVID-19 vaccine as a booster shot.

The company said it filed a request for people ages 18 and older who have received the one-shot vaccine. Johnson & Johnson submitted data for several different booster intervals -- ranging from 2 months to 6 months -- but didn’t formally recommend one to the FDA, The Associated Press reported.

“We’re describing the data to them,” Mathai Mammen, MD, head of global research and development for Janssen, the company’s vaccine division, told CNN.

“The process is not that we asked for a very specific interval -- we’re providing them data and we’re going to be presenting to the committee,” he said. “They’ll take all that into consideration when they ultimately decide on an appropriate interval.”

The FDA’s independent vaccine advisory committee meets next week to review data on booster shots from both Johnson & Johnson and Moderna. It’s the first step in the review process, which then requires approval from leaders at the FDA and Centers for Disease Control and Prevention. If both agencies authorize the extra shots, Americans could receive boosters from Johnson & Johnson and Moderna later this month, the AP reported.

Johnson & Johnson previously released data that showed the vaccine remains highly effective against COVID-19 at least 5 months after vaccination, with 81% efficacy against hospitalizations in the United States.

Two weeks ago, the company reported that a booster dose at 2 months or 6 months further lifted immunity, with a booster at 2 months providing 94% protection against moderate and severe COVID-19. The company said the 6-month booster raised antibodies by 12 times but didn’t release additional data at that time.

In September, the FDA authorized booster shots of the Pfizer vaccine for ages 65 and older, those who live in long-term care facilities, and those with higher risks for contracting COVID-19. The Biden administration is supporting a booster campaign to address potential waning vaccine immunity and remaining surges of the more contagious Delta variant, the AP reported.

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

With the Delta variant of COVID-19 still raging in the United States and ICUs in parts of the country filled with patients with the coronavirus, experts are voicing concern about the added risk of a difficult flu season.

Two mathematical models are predicting a big rebound in the number and severity of flu cases in the 2021-22 season after 2020-2021’s flu season failed to show up when public health measures brought in to control COVID-19 seemed to have the added benefit of stopping the flu.

But both analyses, posted to the medRxiv preprint server and not yet peer reviewed by other experts, have come to the same conclusion: The flu could make a comeback this year.

In the worst-case scenario, the United States could see an extra 300,000-400,000 hospitalizations from the flu – almost double the usual number – according to senior study author Mark Roberts, MD, director of the Public Health Dynamics Laboratory at the University of Pittsburgh. These numbers could be a disaster in areas where hospitals are already filled with COVID-19 patients.

Waning natural immunity in the public because of 2020-2021’s missing flu season could make people, especially young children, more likely to get the virus.

“Usually, a combination of natural immunity and vaccination helps tamp down seasonal influenza,” said Dr. Roberts. “If we don’t have the first part, we’ll have to rely more on the vaccine.”

In a typical year, about half of Americans get the flu shot. The new mathematical models predict that the vaccination rate would need to rise to about 75% to avoid the extra hospitalizations. But even a 10% increase in vaccination rates could reduce hospitalizations by 6%-46%, depending on what strains are dominant.

Usually, the Southern Hemisphere flu season, from February to August, helps show what the Northern Hemisphere can expect over the coming winter. But with strict COVID-19 measures and limits on international travel still in place in countries like Australia and New Zealand and much of South America, it has been another record-low year for flu infections, said Ian Barr, PhD, deputy director of the World Health Organization’s Collaborating Center for Reference and Research on Influenza in Melbourne.

Australia detected only around 500 cases in 2021, compared with about 300,000 in a normal year, and recorded no hospitalizations or deaths from the flu. New Zealand recorded just two cases.

“I’ve never seen anything like this,” Dr. Barr said.

In Australia, the mild flu season led to fewer people getting their flu shot than usual. The rate fell from around 50% to just 33%, said Dr. Barr. “If that happens in the U.S., the population will be even more vulnerable because there has been almost no flu for more than 12 months,” he said.

Both Dr. Roberts and Dr. Barr say it is vital that as many people as possible get vaccinated during the upcoming flu season, especially children who will have almost no natural immunity to the virus.

“The vaccine is our best weapon against the flu, especially for the most at-risk groups,” said Dr. Barr.

Other parts of the world had mixed results. India saw a high number of flu cases, while neighboring Sri Lanka had very few. West Africa also saw quite a high level of circulating virus. Overall, the flu was detected in 45 countries during the Southern Hemisphere season, less than half of what might be expected in a normal year, said Dr. Barr.

Despite the overall low numbers, the WHO saw enough in the data to make two changes to 2022’s Southern Hemisphere vaccine formulation at its meeting on Sept. 24, after changing just one of the strains for the Northern Hemisphere vaccine at its meeting in February.

The CDC recommends that everyone 6 months or older get the flu shot, with few exceptions.

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

With the Delta variant of COVID-19 still raging in the United States and ICUs in parts of the country filled with patients with the coronavirus, experts are voicing concern about the added risk of a difficult flu season.

Two mathematical models are predicting a big rebound in the number and severity of flu cases in the 2021-22 season after 2020-2021’s flu season failed to show up when public health measures brought in to control COVID-19 seemed to have the added benefit of stopping the flu.

But both analyses, posted to the medRxiv preprint server and not yet peer reviewed by other experts, have come to the same conclusion: The flu could make a comeback this year.

In the worst-case scenario, the United States could see an extra 300,000-400,000 hospitalizations from the flu – almost double the usual number – according to senior study author Mark Roberts, MD, director of the Public Health Dynamics Laboratory at the University of Pittsburgh. These numbers could be a disaster in areas where hospitals are already filled with COVID-19 patients.

Waning natural immunity in the public because of 2020-2021’s missing flu season could make people, especially young children, more likely to get the virus.

“Usually, a combination of natural immunity and vaccination helps tamp down seasonal influenza,” said Dr. Roberts. “If we don’t have the first part, we’ll have to rely more on the vaccine.”

In a typical year, about half of Americans get the flu shot. The new mathematical models predict that the vaccination rate would need to rise to about 75% to avoid the extra hospitalizations. But even a 10% increase in vaccination rates could reduce hospitalizations by 6%-46%, depending on what strains are dominant.

Usually, the Southern Hemisphere flu season, from February to August, helps show what the Northern Hemisphere can expect over the coming winter. But with strict COVID-19 measures and limits on international travel still in place in countries like Australia and New Zealand and much of South America, it has been another record-low year for flu infections, said Ian Barr, PhD, deputy director of the World Health Organization’s Collaborating Center for Reference and Research on Influenza in Melbourne.

Australia detected only around 500 cases in 2021, compared with about 300,000 in a normal year, and recorded no hospitalizations or deaths from the flu. New Zealand recorded just two cases.

“I’ve never seen anything like this,” Dr. Barr said.

In Australia, the mild flu season led to fewer people getting their flu shot than usual. The rate fell from around 50% to just 33%, said Dr. Barr. “If that happens in the U.S., the population will be even more vulnerable because there has been almost no flu for more than 12 months,” he said.

Both Dr. Roberts and Dr. Barr say it is vital that as many people as possible get vaccinated during the upcoming flu season, especially children who will have almost no natural immunity to the virus.

“The vaccine is our best weapon against the flu, especially for the most at-risk groups,” said Dr. Barr.

Other parts of the world had mixed results. India saw a high number of flu cases, while neighboring Sri Lanka had very few. West Africa also saw quite a high level of circulating virus. Overall, the flu was detected in 45 countries during the Southern Hemisphere season, less than half of what might be expected in a normal year, said Dr. Barr.

Despite the overall low numbers, the WHO saw enough in the data to make two changes to 2022’s Southern Hemisphere vaccine formulation at its meeting on Sept. 24, after changing just one of the strains for the Northern Hemisphere vaccine at its meeting in February.

The CDC recommends that everyone 6 months or older get the flu shot, with few exceptions.

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

With the Delta variant of COVID-19 still raging in the United States and ICUs in parts of the country filled with patients with the coronavirus, experts are voicing concern about the added risk of a difficult flu season.

Two mathematical models are predicting a big rebound in the number and severity of flu cases in the 2021-22 season after 2020-2021’s flu season failed to show up when public health measures brought in to control COVID-19 seemed to have the added benefit of stopping the flu.

But both analyses, posted to the medRxiv preprint server and not yet peer reviewed by other experts, have come to the same conclusion: The flu could make a comeback this year.

In the worst-case scenario, the United States could see an extra 300,000-400,000 hospitalizations from the flu – almost double the usual number – according to senior study author Mark Roberts, MD, director of the Public Health Dynamics Laboratory at the University of Pittsburgh. These numbers could be a disaster in areas where hospitals are already filled with COVID-19 patients.

Waning natural immunity in the public because of 2020-2021’s missing flu season could make people, especially young children, more likely to get the virus.

“Usually, a combination of natural immunity and vaccination helps tamp down seasonal influenza,” said Dr. Roberts. “If we don’t have the first part, we’ll have to rely more on the vaccine.”

In a typical year, about half of Americans get the flu shot. The new mathematical models predict that the vaccination rate would need to rise to about 75% to avoid the extra hospitalizations. But even a 10% increase in vaccination rates could reduce hospitalizations by 6%-46%, depending on what strains are dominant.

Usually, the Southern Hemisphere flu season, from February to August, helps show what the Northern Hemisphere can expect over the coming winter. But with strict COVID-19 measures and limits on international travel still in place in countries like Australia and New Zealand and much of South America, it has been another record-low year for flu infections, said Ian Barr, PhD, deputy director of the World Health Organization’s Collaborating Center for Reference and Research on Influenza in Melbourne.

Australia detected only around 500 cases in 2021, compared with about 300,000 in a normal year, and recorded no hospitalizations or deaths from the flu. New Zealand recorded just two cases.

“I’ve never seen anything like this,” Dr. Barr said.

In Australia, the mild flu season led to fewer people getting their flu shot than usual. The rate fell from around 50% to just 33%, said Dr. Barr. “If that happens in the U.S., the population will be even more vulnerable because there has been almost no flu for more than 12 months,” he said.

Both Dr. Roberts and Dr. Barr say it is vital that as many people as possible get vaccinated during the upcoming flu season, especially children who will have almost no natural immunity to the virus.

“The vaccine is our best weapon against the flu, especially for the most at-risk groups,” said Dr. Barr.

Other parts of the world had mixed results. India saw a high number of flu cases, while neighboring Sri Lanka had very few. West Africa also saw quite a high level of circulating virus. Overall, the flu was detected in 45 countries during the Southern Hemisphere season, less than half of what might be expected in a normal year, said Dr. Barr.

Despite the overall low numbers, the WHO saw enough in the data to make two changes to 2022’s Southern Hemisphere vaccine formulation at its meeting on Sept. 24, after changing just one of the strains for the Northern Hemisphere vaccine at its meeting in February.

The CDC recommends that everyone 6 months or older get the flu shot, with few exceptions.

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

One week after reporting promising results from the trial of their COVID-19 vaccine in children ages 5-11, Pfizer and BioNTech announced they’d submitted the data to the Food and Drug Administration. But that hasn’t stopped some parents from discreetly getting their children under age 12 vaccinated.

“The FDA, you never want to get ahead of their judgment,” Anthony S. Fauci, MD, director of the National Institute of Allergy and Infectious Diseases, told MSNBC on Sept. 28. “But I would imagine in the next few weeks, they will examine that data and hopefully they’ll give the okay so that we can start vaccinating children, hopefully before the end of October.”
 

Lying to vaccinate now

More than half of all parents with children under 12 say they plan to get their kids vaccinated, according to a Gallup poll. Among those who say they’re “very worried” or “somewhat worried” about their children catching COVID, that number goes up to 90% and 72%, respectively.

And although the FDA and the American Academy of Pediatrics have warned against it, some parents whose children can pass for 12 have lied to get them vaccinated already.

Dawn G. is a mom of two in southwest Missouri, where less than 45% of the population has been fully vaccinated. Her son turns 12 in early October, but in-person school started in mid-August.

“It was scary, thinking of him going to school for even 2 months,” she said. “Some parents thought their kid had a low chance of getting COVID, and their kid died. Nobody expects it to be them.”

In July, she and her husband took their son to a walk-in clinic and lied about his age.

“So many things can happen, from bullying to school shootings, and now this added pandemic risk,” she said. “I’ll do anything I can to protect my child, and a birthdate seems so arbitrary. He’ll be 12 in a matter of weeks. It seems ridiculous that that date would stop me from protecting him.”

In northern California, Carrie S. had a similar thought. When the vaccine was authorized for children ages 12-15 in May, the older of her two children got the shot right away. But her youngest doesn’t turn 12 until November.

“We were tempted to get the younger one vaccinated in May, but it didn’t seem like a rush. We were willing to wait to get the dosage right,” she ssaid. “But as Delta came through, there were no options for online school, the CDC was dropping mask expectations –it seemed like the world was ready to forget the pandemic was happening. It seemed like the least-bad option to get her vaccinated so she could go back to school, and we could find some balance of risk in our lives.”
 

Adult vs. pediatric doses

For now, experts advise against getting younger children vaccinated, even those who are the size of an adult, because of the way the human immune system develops.

“It’s not really about size,” said Anne Liu, MD, an immunologist and pediatrics professor at Stanford (Calif.) University. “The immune system behaves differently at different ages. Younger kids tend to have a more exuberant innate immune system, which is the part of the immune system that senses danger, even before it has developed a memory response.”

The adult Pfizer-BioNTech vaccine contains 30 mcg of mRNA, while the pediatric dose is just 10 mcg. That smaller dose produces an immune response similar to what’s seen in adults who receive 30 mcg, according to Pfizer.

“We were one of the sites that was involved in the phase 1 trial, a lot of times that’s called a dose-finding trial,” said Michael Smith, MD, a coinvestigator for the COVID vaccine trials done at Duke University. “And basically, if younger kids got a higher dose, they had more of a reaction, so it hurt more. They had fever, they had more redness and swelling at the site of the injection, and they just felt lousy, more than at the lower doses.”

At this point, with Pfizer’s data showing that younger children need a smaller dose, it doesn’t make sense to lie about your child’s age, said Dr. Smith.

“If my two options were having my child get the infection versus getting the vaccine, I’d get the vaccine. But we’re a few weeks away from getting the lower dose approved in kids,” he said. “It’s certainly safer. I don’t expect major, lifelong side effects from the higher dose, but it’s going to hurt, your kid’s going to have a fever, they’re going to feel lousy for a couple days, and they just don’t need that much antigen.”

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

One week after reporting promising results from the trial of their COVID-19 vaccine in children ages 5-11, Pfizer and BioNTech announced they’d submitted the data to the Food and Drug Administration. But that hasn’t stopped some parents from discreetly getting their children under age 12 vaccinated.

“The FDA, you never want to get ahead of their judgment,” Anthony S. Fauci, MD, director of the National Institute of Allergy and Infectious Diseases, told MSNBC on Sept. 28. “But I would imagine in the next few weeks, they will examine that data and hopefully they’ll give the okay so that we can start vaccinating children, hopefully before the end of October.”
 

Lying to vaccinate now

More than half of all parents with children under 12 say they plan to get their kids vaccinated, according to a Gallup poll. Among those who say they’re “very worried” or “somewhat worried” about their children catching COVID, that number goes up to 90% and 72%, respectively.

And although the FDA and the American Academy of Pediatrics have warned against it, some parents whose children can pass for 12 have lied to get them vaccinated already.

Dawn G. is a mom of two in southwest Missouri, where less than 45% of the population has been fully vaccinated. Her son turns 12 in early October, but in-person school started in mid-August.

“It was scary, thinking of him going to school for even 2 months,” she said. “Some parents thought their kid had a low chance of getting COVID, and their kid died. Nobody expects it to be them.”

In July, she and her husband took their son to a walk-in clinic and lied about his age.

“So many things can happen, from bullying to school shootings, and now this added pandemic risk,” she said. “I’ll do anything I can to protect my child, and a birthdate seems so arbitrary. He’ll be 12 in a matter of weeks. It seems ridiculous that that date would stop me from protecting him.”

In northern California, Carrie S. had a similar thought. When the vaccine was authorized for children ages 12-15 in May, the older of her two children got the shot right away. But her youngest doesn’t turn 12 until November.

“We were tempted to get the younger one vaccinated in May, but it didn’t seem like a rush. We were willing to wait to get the dosage right,” she ssaid. “But as Delta came through, there were no options for online school, the CDC was dropping mask expectations –it seemed like the world was ready to forget the pandemic was happening. It seemed like the least-bad option to get her vaccinated so she could go back to school, and we could find some balance of risk in our lives.”
 

Adult vs. pediatric doses

For now, experts advise against getting younger children vaccinated, even those who are the size of an adult, because of the way the human immune system develops.

“It’s not really about size,” said Anne Liu, MD, an immunologist and pediatrics professor at Stanford (Calif.) University. “The immune system behaves differently at different ages. Younger kids tend to have a more exuberant innate immune system, which is the part of the immune system that senses danger, even before it has developed a memory response.”

The adult Pfizer-BioNTech vaccine contains 30 mcg of mRNA, while the pediatric dose is just 10 mcg. That smaller dose produces an immune response similar to what’s seen in adults who receive 30 mcg, according to Pfizer.

“We were one of the sites that was involved in the phase 1 trial, a lot of times that’s called a dose-finding trial,” said Michael Smith, MD, a coinvestigator for the COVID vaccine trials done at Duke University. “And basically, if younger kids got a higher dose, they had more of a reaction, so it hurt more. They had fever, they had more redness and swelling at the site of the injection, and they just felt lousy, more than at the lower doses.”

At this point, with Pfizer’s data showing that younger children need a smaller dose, it doesn’t make sense to lie about your child’s age, said Dr. Smith.

“If my two options were having my child get the infection versus getting the vaccine, I’d get the vaccine. But we’re a few weeks away from getting the lower dose approved in kids,” he said. “It’s certainly safer. I don’t expect major, lifelong side effects from the higher dose, but it’s going to hurt, your kid’s going to have a fever, they’re going to feel lousy for a couple days, and they just don’t need that much antigen.”

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

One week after reporting promising results from the trial of their COVID-19 vaccine in children ages 5-11, Pfizer and BioNTech announced they’d submitted the data to the Food and Drug Administration. But that hasn’t stopped some parents from discreetly getting their children under age 12 vaccinated.

“The FDA, you never want to get ahead of their judgment,” Anthony S. Fauci, MD, director of the National Institute of Allergy and Infectious Diseases, told MSNBC on Sept. 28. “But I would imagine in the next few weeks, they will examine that data and hopefully they’ll give the okay so that we can start vaccinating children, hopefully before the end of October.”
 

Lying to vaccinate now

More than half of all parents with children under 12 say they plan to get their kids vaccinated, according to a Gallup poll. Among those who say they’re “very worried” or “somewhat worried” about their children catching COVID, that number goes up to 90% and 72%, respectively.

And although the FDA and the American Academy of Pediatrics have warned against it, some parents whose children can pass for 12 have lied to get them vaccinated already.

Dawn G. is a mom of two in southwest Missouri, where less than 45% of the population has been fully vaccinated. Her son turns 12 in early October, but in-person school started in mid-August.

“It was scary, thinking of him going to school for even 2 months,” she said. “Some parents thought their kid had a low chance of getting COVID, and their kid died. Nobody expects it to be them.”

In July, she and her husband took their son to a walk-in clinic and lied about his age.

“So many things can happen, from bullying to school shootings, and now this added pandemic risk,” she said. “I’ll do anything I can to protect my child, and a birthdate seems so arbitrary. He’ll be 12 in a matter of weeks. It seems ridiculous that that date would stop me from protecting him.”

In northern California, Carrie S. had a similar thought. When the vaccine was authorized for children ages 12-15 in May, the older of her two children got the shot right away. But her youngest doesn’t turn 12 until November.

“We were tempted to get the younger one vaccinated in May, but it didn’t seem like a rush. We were willing to wait to get the dosage right,” she ssaid. “But as Delta came through, there were no options for online school, the CDC was dropping mask expectations –it seemed like the world was ready to forget the pandemic was happening. It seemed like the least-bad option to get her vaccinated so she could go back to school, and we could find some balance of risk in our lives.”
 

Adult vs. pediatric doses

For now, experts advise against getting younger children vaccinated, even those who are the size of an adult, because of the way the human immune system develops.

“It’s not really about size,” said Anne Liu, MD, an immunologist and pediatrics professor at Stanford (Calif.) University. “The immune system behaves differently at different ages. Younger kids tend to have a more exuberant innate immune system, which is the part of the immune system that senses danger, even before it has developed a memory response.”

The adult Pfizer-BioNTech vaccine contains 30 mcg of mRNA, while the pediatric dose is just 10 mcg. That smaller dose produces an immune response similar to what’s seen in adults who receive 30 mcg, according to Pfizer.

“We were one of the sites that was involved in the phase 1 trial, a lot of times that’s called a dose-finding trial,” said Michael Smith, MD, a coinvestigator for the COVID vaccine trials done at Duke University. “And basically, if younger kids got a higher dose, they had more of a reaction, so it hurt more. They had fever, they had more redness and swelling at the site of the injection, and they just felt lousy, more than at the lower doses.”

At this point, with Pfizer’s data showing that younger children need a smaller dose, it doesn’t make sense to lie about your child’s age, said Dr. Smith.

“If my two options were having my child get the infection versus getting the vaccine, I’d get the vaccine. But we’re a few weeks away from getting the lower dose approved in kids,” he said. “It’s certainly safer. I don’t expect major, lifelong side effects from the higher dose, but it’s going to hurt, your kid’s going to have a fever, they’re going to feel lousy for a couple days, and they just don’t need that much antigen.”

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

A new series of cases of cerebral venous sinus thrombosis (CVST) linked to the adenoviral vector COVID-19 vaccines has been reported, confirming the severity of the reaction and the associated high mortality rate.

The new series comes from an international registry of consecutive patients who experienced CVST within 28 days of COVID-19 vaccination between March 29 and June 18, 2021, from 81 hospitals in 19 countries.

The cases are described in an article published online on Sept. 28. in JAMA Neurology.

“This is a reliable description on the clinical condition of these patients with CVST associated with COVID-19 vaccination. It is striking that this a much worse condition than CVST not associated with COVID-19 vaccination, with a much higher rate of intracerebral hemorrhage and coma and a much higher mortality rate,” senior author Jonathan M. Coutinho, MD, Amsterdam University Medical Centers, told this news organization.

These data confirm the observations from an earlier U.K. cohort in which cases of cerebral venous thrombosis linked to COVID-19 vaccination occurred.

“This is the biggest series, and as an international series, it gives a broader perspective from a larger range of countries,” Dr. Coutinho said. “All the data together show that, although this side effect is rare, the consequences are very severe,” he added.

In the current study, the researchers regarded CVST as being linked to the vaccine if it was accompanied by thrombosis with thrombocytopenia syndrome (TTS), as evidenced by thrombosis and new-onset thrombocytopenia.

In the cohort of 116 patients with CVST after COVID-19 vaccination, 78 (67.2%) had thrombosis with TTS and were thus classified as having had a vaccine-related adverse event. These patients were frequently comatose at presentation (24%) and often had intracerebral hemorrhage (68%) and concomitant thromboembolism (36%); 47% died during hospitalization.

These patients were compared with the 38 patients in the same cohort who had CVST but in whom there was no indication of concomitant thrombosis and thrombocytopenia. The case patients were also compared with a control group of 207 patients with CVST who were included in a separate international registry before the COVID-19 pandemic.

Mortality rates were much higher among the patients deemed to have had a vaccine-related CVST. The in-hospital mortality rate was 47%, compared with 5% among the patients in the same cohort who did not have TTS and 3.9% among the prepandemic control group.

The mortality rate was even higher (61%) among patients in the TTS group for whom the diagnosis was made before the condition garnered attention in the scientific community. The mortality rate was 42% among patients diagnosed later.

Of the 78 patients in whom CVST and TTS occurred after COVID-19 vaccination in this cohort, 76 had received the AstraZeneca vaccine (in 75 patients, CVST and TTS occurred after the first vaccination; in one patient, they occurred after the second vaccination). One patient had received the Johnson & Johnson vaccine, and one had received the Pfizer vaccine.

“After more analysis, the case after the Pfizer vaccination is not believed to be caused by the vaccine,” Dr. Coutinho said. “In that case, the patient had a platelet count just below the lower limit and was taking an immunomodulator drug that is known to be associated with thrombocytopenia.”

For two patients who received the AstraZeneca vaccine, there was also an alternative explanation for the thrombocytopenia.

Dr. Coutinho also pointed out that the Johnson & Johnson vaccine has been used mainly in the United States, and these data were largely from other countries.

The median time from vaccination to CVST symptom onset was 9 days in the TTS group. The median platelet count at hospital admission among patients with postvaccination CVST-TTS was 45. Three patients presented with a normal platelet count and developed thrombocytopenia during admission; two patients presented with mild thrombocytopenia, 30 presented with moderate thrombocytopenia, and 43 presented with severe thrombocytopenia.

Antibodies against platelet factor 4 (PF4) were measured in 69 patients with TTS, of whom 63 (91%) tested positive (the one patient in whom TTS occurred after the patient received the Pfizer vaccine did not test positive). However, the researchers note that sensitivity varies among different PF4 ELISA tests. Findings of platelet activation assays were positive in all 36 tested patients.

In the TTS group, 52 patients (67%) received immunomodulation therapy, most often intravenous immunoglobulins (IVIG). Among patients treated with IVIG, the mortality rate was lower (28%).
 

Different from CVST linked to natural COVID-19 infection

Dr. Coutinho noted that CVST can occur in natural SARS-CoV-2 infection but that vaccine-associated CVST is very different.

“In natural COVID-19 infection, there is an increased risk of thrombosis, and some patients can get CVST as a part of this, but in these cases, this is not accompanied by thrombocytopenia. While the CVST in natural COVID-19 infection is also associated with a bad prognosis, this is more to do with the underlying disease. It is normally the very sick COVID patients who develop CVST, and these patients usually die from the underlying disease rather than the CVST itself,” he explained.

“Clinicians need to be aware of vaccine-related CVST, as it requires very specific and rapid treatment,” Dr. Coutinho stressed.

“Patients presenting with an extremely severe headache (unlike any headache they’ve had before) or with seizures or a focal deficit (weakness in arm or problems with speaking or vision) within 4 weeks of an adenovirus COVID-19 vaccination should ring alarm bells. It is important to do diagnostics quickly, with a platelet count the most important first step, and a rapid CT/MRI scan,” he said.

Other tests that should be conducted are D-dimer for thrombosis and the PF4 antibody test. But results for the PF4 antibody test can take days to come back, and clinicians shouldn’t wait for that, Dr. Coutinho notes.

“Specific treatment needs to be given immediately – with anticoagulation (preferably nonheparin) and immunomodulation with IVIG to stop the immune reaction. Platelets should not be given – that may seem counterintuitive in patients with a low platelet count, but giving platelets makes it worse,” he said.
 

Is there a geographic difference?

Dr. Coutinho pointed out that fewer cases of this vaccine-related CVST are being reported at the current time.

“We are not sure why this is the case. These adenovirus vaccines are not being used much now in Western countries, but our collaboration covers many less developed countries in South America and Asia, which are relying heavily on these vaccines. We are now shifting focus to these countries, but so far we have only seen a handful of cases from these areas,” he said.

He suggested that this may be because these countries started their vaccination programs later and are vaccinating their elderly (who are not so susceptible to this side effect) first, or it may be because of some environmental or genetic factor that has not yet been discovered.

“This is now an important research question – is the risk of vaccine-induced CVST the same in different countries or ethnicities? This could influence decisions on future vaccine strategies,” Dr. Coutinho said.

“So far, female sex is the strongest risk factor for vaccine-induced CVST. In our cohort, 81% of cases were in women. In addition, 95% were White, but that doesn’t allow us to conclude that this is a risk factor, as the majority of people who have been vaccinated are White. So, we have no clear insight into that yet,” he said.

In a comment for this news organization, the lead author of the previous U.K. report of a series of 70 cases of cerebral venous thrombosis linked to COVID-19 vaccination, Richard Perry, PhD, University College Hospital, London, described this new report as “an excellent study, with many of the same strengths and weaknesses as our study and has very similar results.”

Dr. Perry noted that the two studies used slightly different definitions of vaccine-induced thrombotic thrombocytopenia, but the cases reported appear to be very similar overall. “It is reassuring and gratifying to see that they have made such similar observations,” he said.

“And as they have drawn their cases from a broad range of countries whereas ours were all from the U.K., this provides evidence that the observations from both studies are reasonably generalizable,” he added.

Dr. Perry pointed out that this new report states that TTS occurred in one patient after the patient had received a second dose of the AstraZeneca vaccine. “I would like to know more about this case, because we didn’t see any cases after a second dose in our cohort,” he said.

Dr. Coutinho responded that he didn’t believe this was the first reported case after the second dose.

The study did not receive any specific funding. Dr. Coutinho has received grants paid to his institution from Boehringer Ingelheim and Bayer and payments paid to his institution for data safety monitoring board participation by Bayer.

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

A new series of cases of cerebral venous sinus thrombosis (CVST) linked to the adenoviral vector COVID-19 vaccines has been reported, confirming the severity of the reaction and the associated high mortality rate.

The new series comes from an international registry of consecutive patients who experienced CVST within 28 days of COVID-19 vaccination between March 29 and June 18, 2021, from 81 hospitals in 19 countries.

The cases are described in an article published online on Sept. 28. in JAMA Neurology.

“This is a reliable description on the clinical condition of these patients with CVST associated with COVID-19 vaccination. It is striking that this a much worse condition than CVST not associated with COVID-19 vaccination, with a much higher rate of intracerebral hemorrhage and coma and a much higher mortality rate,” senior author Jonathan M. Coutinho, MD, Amsterdam University Medical Centers, told this news organization.

These data confirm the observations from an earlier U.K. cohort in which cases of cerebral venous thrombosis linked to COVID-19 vaccination occurred.

“This is the biggest series, and as an international series, it gives a broader perspective from a larger range of countries,” Dr. Coutinho said. “All the data together show that, although this side effect is rare, the consequences are very severe,” he added.

In the current study, the researchers regarded CVST as being linked to the vaccine if it was accompanied by thrombosis with thrombocytopenia syndrome (TTS), as evidenced by thrombosis and new-onset thrombocytopenia.

In the cohort of 116 patients with CVST after COVID-19 vaccination, 78 (67.2%) had thrombosis with TTS and were thus classified as having had a vaccine-related adverse event. These patients were frequently comatose at presentation (24%) and often had intracerebral hemorrhage (68%) and concomitant thromboembolism (36%); 47% died during hospitalization.

These patients were compared with the 38 patients in the same cohort who had CVST but in whom there was no indication of concomitant thrombosis and thrombocytopenia. The case patients were also compared with a control group of 207 patients with CVST who were included in a separate international registry before the COVID-19 pandemic.

Mortality rates were much higher among the patients deemed to have had a vaccine-related CVST. The in-hospital mortality rate was 47%, compared with 5% among the patients in the same cohort who did not have TTS and 3.9% among the prepandemic control group.

The mortality rate was even higher (61%) among patients in the TTS group for whom the diagnosis was made before the condition garnered attention in the scientific community. The mortality rate was 42% among patients diagnosed later.

Of the 78 patients in whom CVST and TTS occurred after COVID-19 vaccination in this cohort, 76 had received the AstraZeneca vaccine (in 75 patients, CVST and TTS occurred after the first vaccination; in one patient, they occurred after the second vaccination). One patient had received the Johnson & Johnson vaccine, and one had received the Pfizer vaccine.

“After more analysis, the case after the Pfizer vaccination is not believed to be caused by the vaccine,” Dr. Coutinho said. “In that case, the patient had a platelet count just below the lower limit and was taking an immunomodulator drug that is known to be associated with thrombocytopenia.”

For two patients who received the AstraZeneca vaccine, there was also an alternative explanation for the thrombocytopenia.

Dr. Coutinho also pointed out that the Johnson & Johnson vaccine has been used mainly in the United States, and these data were largely from other countries.

The median time from vaccination to CVST symptom onset was 9 days in the TTS group. The median platelet count at hospital admission among patients with postvaccination CVST-TTS was 45. Three patients presented with a normal platelet count and developed thrombocytopenia during admission; two patients presented with mild thrombocytopenia, 30 presented with moderate thrombocytopenia, and 43 presented with severe thrombocytopenia.

Antibodies against platelet factor 4 (PF4) were measured in 69 patients with TTS, of whom 63 (91%) tested positive (the one patient in whom TTS occurred after the patient received the Pfizer vaccine did not test positive). However, the researchers note that sensitivity varies among different PF4 ELISA tests. Findings of platelet activation assays were positive in all 36 tested patients.

In the TTS group, 52 patients (67%) received immunomodulation therapy, most often intravenous immunoglobulins (IVIG). Among patients treated with IVIG, the mortality rate was lower (28%).
 

Different from CVST linked to natural COVID-19 infection

Dr. Coutinho noted that CVST can occur in natural SARS-CoV-2 infection but that vaccine-associated CVST is very different.

“In natural COVID-19 infection, there is an increased risk of thrombosis, and some patients can get CVST as a part of this, but in these cases, this is not accompanied by thrombocytopenia. While the CVST in natural COVID-19 infection is also associated with a bad prognosis, this is more to do with the underlying disease. It is normally the very sick COVID patients who develop CVST, and these patients usually die from the underlying disease rather than the CVST itself,” he explained.

“Clinicians need to be aware of vaccine-related CVST, as it requires very specific and rapid treatment,” Dr. Coutinho stressed.

“Patients presenting with an extremely severe headache (unlike any headache they’ve had before) or with seizures or a focal deficit (weakness in arm or problems with speaking or vision) within 4 weeks of an adenovirus COVID-19 vaccination should ring alarm bells. It is important to do diagnostics quickly, with a platelet count the most important first step, and a rapid CT/MRI scan,” he said.

Other tests that should be conducted are D-dimer for thrombosis and the PF4 antibody test. But results for the PF4 antibody test can take days to come back, and clinicians shouldn’t wait for that, Dr. Coutinho notes.

“Specific treatment needs to be given immediately – with anticoagulation (preferably nonheparin) and immunomodulation with IVIG to stop the immune reaction. Platelets should not be given – that may seem counterintuitive in patients with a low platelet count, but giving platelets makes it worse,” he said.
 

Is there a geographic difference?

Dr. Coutinho pointed out that fewer cases of this vaccine-related CVST are being reported at the current time.

“We are not sure why this is the case. These adenovirus vaccines are not being used much now in Western countries, but our collaboration covers many less developed countries in South America and Asia, which are relying heavily on these vaccines. We are now shifting focus to these countries, but so far we have only seen a handful of cases from these areas,” he said.

He suggested that this may be because these countries started their vaccination programs later and are vaccinating their elderly (who are not so susceptible to this side effect) first, or it may be because of some environmental or genetic factor that has not yet been discovered.

“This is now an important research question – is the risk of vaccine-induced CVST the same in different countries or ethnicities? This could influence decisions on future vaccine strategies,” Dr. Coutinho said.

“So far, female sex is the strongest risk factor for vaccine-induced CVST. In our cohort, 81% of cases were in women. In addition, 95% were White, but that doesn’t allow us to conclude that this is a risk factor, as the majority of people who have been vaccinated are White. So, we have no clear insight into that yet,” he said.

In a comment for this news organization, the lead author of the previous U.K. report of a series of 70 cases of cerebral venous thrombosis linked to COVID-19 vaccination, Richard Perry, PhD, University College Hospital, London, described this new report as “an excellent study, with many of the same strengths and weaknesses as our study and has very similar results.”

Dr. Perry noted that the two studies used slightly different definitions of vaccine-induced thrombotic thrombocytopenia, but the cases reported appear to be very similar overall. “It is reassuring and gratifying to see that they have made such similar observations,” he said.

“And as they have drawn their cases from a broad range of countries whereas ours were all from the U.K., this provides evidence that the observations from both studies are reasonably generalizable,” he added.

Dr. Perry pointed out that this new report states that TTS occurred in one patient after the patient had received a second dose of the AstraZeneca vaccine. “I would like to know more about this case, because we didn’t see any cases after a second dose in our cohort,” he said.

Dr. Coutinho responded that he didn’t believe this was the first reported case after the second dose.

The study did not receive any specific funding. Dr. Coutinho has received grants paid to his institution from Boehringer Ingelheim and Bayer and payments paid to his institution for data safety monitoring board participation by Bayer.

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

A new series of cases of cerebral venous sinus thrombosis (CVST) linked to the adenoviral vector COVID-19 vaccines has been reported, confirming the severity of the reaction and the associated high mortality rate.

The new series comes from an international registry of consecutive patients who experienced CVST within 28 days of COVID-19 vaccination between March 29 and June 18, 2021, from 81 hospitals in 19 countries.

The cases are described in an article published online on Sept. 28. in JAMA Neurology.

“This is a reliable description on the clinical condition of these patients with CVST associated with COVID-19 vaccination. It is striking that this a much worse condition than CVST not associated with COVID-19 vaccination, with a much higher rate of intracerebral hemorrhage and coma and a much higher mortality rate,” senior author Jonathan M. Coutinho, MD, Amsterdam University Medical Centers, told this news organization.

These data confirm the observations from an earlier U.K. cohort in which cases of cerebral venous thrombosis linked to COVID-19 vaccination occurred.

“This is the biggest series, and as an international series, it gives a broader perspective from a larger range of countries,” Dr. Coutinho said. “All the data together show that, although this side effect is rare, the consequences are very severe,” he added.

In the current study, the researchers regarded CVST as being linked to the vaccine if it was accompanied by thrombosis with thrombocytopenia syndrome (TTS), as evidenced by thrombosis and new-onset thrombocytopenia.

In the cohort of 116 patients with CVST after COVID-19 vaccination, 78 (67.2%) had thrombosis with TTS and were thus classified as having had a vaccine-related adverse event. These patients were frequently comatose at presentation (24%) and often had intracerebral hemorrhage (68%) and concomitant thromboembolism (36%); 47% died during hospitalization.

These patients were compared with the 38 patients in the same cohort who had CVST but in whom there was no indication of concomitant thrombosis and thrombocytopenia. The case patients were also compared with a control group of 207 patients with CVST who were included in a separate international registry before the COVID-19 pandemic.

Mortality rates were much higher among the patients deemed to have had a vaccine-related CVST. The in-hospital mortality rate was 47%, compared with 5% among the patients in the same cohort who did not have TTS and 3.9% among the prepandemic control group.

The mortality rate was even higher (61%) among patients in the TTS group for whom the diagnosis was made before the condition garnered attention in the scientific community. The mortality rate was 42% among patients diagnosed later.

Of the 78 patients in whom CVST and TTS occurred after COVID-19 vaccination in this cohort, 76 had received the AstraZeneca vaccine (in 75 patients, CVST and TTS occurred after the first vaccination; in one patient, they occurred after the second vaccination). One patient had received the Johnson & Johnson vaccine, and one had received the Pfizer vaccine.

“After more analysis, the case after the Pfizer vaccination is not believed to be caused by the vaccine,” Dr. Coutinho said. “In that case, the patient had a platelet count just below the lower limit and was taking an immunomodulator drug that is known to be associated with thrombocytopenia.”

For two patients who received the AstraZeneca vaccine, there was also an alternative explanation for the thrombocytopenia.

Dr. Coutinho also pointed out that the Johnson & Johnson vaccine has been used mainly in the United States, and these data were largely from other countries.

The median time from vaccination to CVST symptom onset was 9 days in the TTS group. The median platelet count at hospital admission among patients with postvaccination CVST-TTS was 45. Three patients presented with a normal platelet count and developed thrombocytopenia during admission; two patients presented with mild thrombocytopenia, 30 presented with moderate thrombocytopenia, and 43 presented with severe thrombocytopenia.

Antibodies against platelet factor 4 (PF4) were measured in 69 patients with TTS, of whom 63 (91%) tested positive (the one patient in whom TTS occurred after the patient received the Pfizer vaccine did not test positive). However, the researchers note that sensitivity varies among different PF4 ELISA tests. Findings of platelet activation assays were positive in all 36 tested patients.

In the TTS group, 52 patients (67%) received immunomodulation therapy, most often intravenous immunoglobulins (IVIG). Among patients treated with IVIG, the mortality rate was lower (28%).
 

Different from CVST linked to natural COVID-19 infection

Dr. Coutinho noted that CVST can occur in natural SARS-CoV-2 infection but that vaccine-associated CVST is very different.

“In natural COVID-19 infection, there is an increased risk of thrombosis, and some patients can get CVST as a part of this, but in these cases, this is not accompanied by thrombocytopenia. While the CVST in natural COVID-19 infection is also associated with a bad prognosis, this is more to do with the underlying disease. It is normally the very sick COVID patients who develop CVST, and these patients usually die from the underlying disease rather than the CVST itself,” he explained.

“Clinicians need to be aware of vaccine-related CVST, as it requires very specific and rapid treatment,” Dr. Coutinho stressed.

“Patients presenting with an extremely severe headache (unlike any headache they’ve had before) or with seizures or a focal deficit (weakness in arm or problems with speaking or vision) within 4 weeks of an adenovirus COVID-19 vaccination should ring alarm bells. It is important to do diagnostics quickly, with a platelet count the most important first step, and a rapid CT/MRI scan,” he said.

Other tests that should be conducted are D-dimer for thrombosis and the PF4 antibody test. But results for the PF4 antibody test can take days to come back, and clinicians shouldn’t wait for that, Dr. Coutinho notes.

“Specific treatment needs to be given immediately – with anticoagulation (preferably nonheparin) and immunomodulation with IVIG to stop the immune reaction. Platelets should not be given – that may seem counterintuitive in patients with a low platelet count, but giving platelets makes it worse,” he said.
 

Is there a geographic difference?

Dr. Coutinho pointed out that fewer cases of this vaccine-related CVST are being reported at the current time.

“We are not sure why this is the case. These adenovirus vaccines are not being used much now in Western countries, but our collaboration covers many less developed countries in South America and Asia, which are relying heavily on these vaccines. We are now shifting focus to these countries, but so far we have only seen a handful of cases from these areas,” he said.

He suggested that this may be because these countries started their vaccination programs later and are vaccinating their elderly (who are not so susceptible to this side effect) first, or it may be because of some environmental or genetic factor that has not yet been discovered.

“This is now an important research question – is the risk of vaccine-induced CVST the same in different countries or ethnicities? This could influence decisions on future vaccine strategies,” Dr. Coutinho said.

“So far, female sex is the strongest risk factor for vaccine-induced CVST. In our cohort, 81% of cases were in women. In addition, 95% were White, but that doesn’t allow us to conclude that this is a risk factor, as the majority of people who have been vaccinated are White. So, we have no clear insight into that yet,” he said.

In a comment for this news organization, the lead author of the previous U.K. report of a series of 70 cases of cerebral venous thrombosis linked to COVID-19 vaccination, Richard Perry, PhD, University College Hospital, London, described this new report as “an excellent study, with many of the same strengths and weaknesses as our study and has very similar results.”

Dr. Perry noted that the two studies used slightly different definitions of vaccine-induced thrombotic thrombocytopenia, but the cases reported appear to be very similar overall. “It is reassuring and gratifying to see that they have made such similar observations,” he said.

“And as they have drawn their cases from a broad range of countries whereas ours were all from the U.K., this provides evidence that the observations from both studies are reasonably generalizable,” he added.

Dr. Perry pointed out that this new report states that TTS occurred in one patient after the patient had received a second dose of the AstraZeneca vaccine. “I would like to know more about this case, because we didn’t see any cases after a second dose in our cohort,” he said.

Dr. Coutinho responded that he didn’t believe this was the first reported case after the second dose.

The study did not receive any specific funding. Dr. Coutinho has received grants paid to his institution from Boehringer Ingelheim and Bayer and payments paid to his institution for data safety monitoring board participation by Bayer.

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

COVID vaccination rates among pregnant people remain low, despite data that shows the vaccines can prevent the high risk of severe disease during pregnancy.

About 30% of pregnant people are vaccinated, according to the latest CDC data, with only 18% obtaining a dose during pregnancy. Health officials have been tracking the timing of vaccination before and during pregnancy.

The vaccination rates are even lower among pregnant Black people, CDC data shows. About 15% are fully vaccinated, compared with 25% of pregnant Hispanic and Latino people, 34% of pregnant White people, and 46% of pregnant Asian people.

“This puts them at severe risk of severe disease from COVID-19,” Rochelle Walensky, MD, the CDC director, said during a news briefing with the White House COVID-19 Response Team.

“We know that pregnant women are at increased risk of severe disease, of hospitalization and ventilation,” she said. “They’re also at increased risk for adverse events to their baby.”

Those who give birth while infected with COVID-19 had “significantly higher rates” of intensive care unit admission, intubation, ventilation, and death, according to a recent study published in JAMA Network Open.

Dr. Walensky said on Sept. 28 that studies show COVID-19 vaccines can be taken at any time while pregnant or breastfeeding. She noted that the vaccines are safe for both mothers and their babies.

“We’ve actually seen that some antibody from the vaccine traverses [the placenta] to the baby and, in fact, could potentially protect the baby,” she said.

Public health officials say the low vaccination rates can be attributed to caution around the time of pregnancy, concern for the baby, barriers to health care, and misinformation promoted online.

“Pregnancy is a precious time. It’s also a time that a lot of women have fear,” Pam Oliver, MD, an obstetrics and gynecology doctor and executive vice president of North Carolina’s Novant Health, told USA Today.

“It is natural to have questions,” she said. “So, let’s talk about what we know, let’s put it in perspective.”

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

COVID vaccination rates among pregnant people remain low, despite data that shows the vaccines can prevent the high risk of severe disease during pregnancy.

About 30% of pregnant people are vaccinated, according to the latest CDC data, with only 18% obtaining a dose during pregnancy. Health officials have been tracking the timing of vaccination before and during pregnancy.

The vaccination rates are even lower among pregnant Black people, CDC data shows. About 15% are fully vaccinated, compared with 25% of pregnant Hispanic and Latino people, 34% of pregnant White people, and 46% of pregnant Asian people.

“This puts them at severe risk of severe disease from COVID-19,” Rochelle Walensky, MD, the CDC director, said during a news briefing with the White House COVID-19 Response Team.

“We know that pregnant women are at increased risk of severe disease, of hospitalization and ventilation,” she said. “They’re also at increased risk for adverse events to their baby.”

Those who give birth while infected with COVID-19 had “significantly higher rates” of intensive care unit admission, intubation, ventilation, and death, according to a recent study published in JAMA Network Open.

Dr. Walensky said on Sept. 28 that studies show COVID-19 vaccines can be taken at any time while pregnant or breastfeeding. She noted that the vaccines are safe for both mothers and their babies.

“We’ve actually seen that some antibody from the vaccine traverses [the placenta] to the baby and, in fact, could potentially protect the baby,” she said.

Public health officials say the low vaccination rates can be attributed to caution around the time of pregnancy, concern for the baby, barriers to health care, and misinformation promoted online.

“Pregnancy is a precious time. It’s also a time that a lot of women have fear,” Pam Oliver, MD, an obstetrics and gynecology doctor and executive vice president of North Carolina’s Novant Health, told USA Today.

“It is natural to have questions,” she said. “So, let’s talk about what we know, let’s put it in perspective.”

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

COVID vaccination rates among pregnant people remain low, despite data that shows the vaccines can prevent the high risk of severe disease during pregnancy.

About 30% of pregnant people are vaccinated, according to the latest CDC data, with only 18% obtaining a dose during pregnancy. Health officials have been tracking the timing of vaccination before and during pregnancy.

The vaccination rates are even lower among pregnant Black people, CDC data shows. About 15% are fully vaccinated, compared with 25% of pregnant Hispanic and Latino people, 34% of pregnant White people, and 46% of pregnant Asian people.

“This puts them at severe risk of severe disease from COVID-19,” Rochelle Walensky, MD, the CDC director, said during a news briefing with the White House COVID-19 Response Team.

“We know that pregnant women are at increased risk of severe disease, of hospitalization and ventilation,” she said. “They’re also at increased risk for adverse events to their baby.”

Those who give birth while infected with COVID-19 had “significantly higher rates” of intensive care unit admission, intubation, ventilation, and death, according to a recent study published in JAMA Network Open.

Dr. Walensky said on Sept. 28 that studies show COVID-19 vaccines can be taken at any time while pregnant or breastfeeding. She noted that the vaccines are safe for both mothers and their babies.

“We’ve actually seen that some antibody from the vaccine traverses [the placenta] to the baby and, in fact, could potentially protect the baby,” she said.

Public health officials say the low vaccination rates can be attributed to caution around the time of pregnancy, concern for the baby, barriers to health care, and misinformation promoted online.

“Pregnancy is a precious time. It’s also a time that a lot of women have fear,” Pam Oliver, MD, an obstetrics and gynecology doctor and executive vice president of North Carolina’s Novant Health, told USA Today.

“It is natural to have questions,” she said. “So, let’s talk about what we know, let’s put it in perspective.”

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

A common inert ingredient may be the culprit behind the rare allergic reactions reported among individuals who have received mRNA COVID-19 vaccines, according to investigators at a large regional health center that was among the first to administer the shots.

Blood samples from 10 of 11 individuals with suspected allergic reactions reacted to polyethylene glycol (PEG), a component of both the Pfizer and Moderna mRNA  vaccines, according to a report in JAMA Network Open.

In total, only 22 individuals had suspected allergic reactions out of nearly 39,000 mRNA COVID-19 vaccine doses administered, the investigators reported, noting that the reactions were generally mild and all fully resolved.

Those findings should be reassuring to individuals who are reticent to sign up for a COVID-19 vaccine because of fear of an allergic reaction, said study senior author Kari Nadeau, MD, PhD, director of the Parker Center for Allergy and Asthma Research at Stanford (Calif.) University.

“We’re hoping that this word will get out and then that the companies could also think about making vaccines that have other products in them that don’t include polyethylene glycol,” Dr. Nadeau said in an interview.

PEG is a compound used in many products, including pharmaceuticals, cosmetics, and food. In the mRNA COVID-19 vaccines, PEG serves to stabilize the lipid nanoparticles that help protect and transport mRNA. However, its use in this setting has been linked to allergic reactions in this and previous studies.

No immunoglobulin E (IgE) antibodies to PEG were detected among the 22 individuals with suspected allergic reactions to mRNA COVID-19 vaccine, but PEG immunoglobulin G (IgG) was present. That suggests non-IgE mediated allergic reactions to PEG may be implicated for the majority of cases, Dr. Nadeau said.

This case series provides interesting new evidence to confirm previous reports that a mechanism other than the classic IgE-mediated allergic response is behind the suspected allergic reactions that are occurring after mRNA COVID-19 vaccine, said Aleena Banerji, MD, associate professor at Harvard Medical School, Boston, and clinical director of the Drug Allergy Program at Massachusetts General Hospital.

“We need to further understand the mechanism of these reactions, but what we know is that IGE mediated allergy to excipients like PEG is probably not the main cause,” Dr. Banerji, who was not involved in the study, said in an interview.

In a recent research letter published in JAMA Internal Medicine, Dr. Banerji and coauthors reported that all individuals with immediate suspected allergic reactions to mRNA COVID-19 vaccine went on to tolerate the second dose, with mild symptoms reported in the minority of patients (32 out of 159, or about 20%).

“Again, that is very consistent with not having an IgE-mediated allergy, so it seems to all be fitting with that picture,” Dr. Banerji said.

The case series by Dr. Nadeau and coauthors was based on review of nearly 39,000 mRNA COVID-19 vaccine doses administered between December 18, 2020 and January 26, 2021. Most mRNA vaccine recipients were Stanford-affiliated health care workers, according to the report.

Among recipients of those doses, they identified 148 individuals who had anaphylaxis-related ICD-10 codes recorded over the same time period. In a review of medical records, investigators pinpointed 22 individuals as having suspected allergy and invited them to participate in follow-up allergy testing.

A total of 11 individuals underwent skin prick testing, but none of them tested positive to PEG or to polysorbate 80, another excipient that has been linked to vaccine-related allergic reactions. One of the patients tested positive to the same mRNA vaccine they had previously received, according to the report.

Those same 11 individuals also underwent basophil activation testing (BAT). In contrast to the skin testing results, BAT results were positive for PEG in 10 of 11 cases (or 91%) and positive for their administered vaccine in all 11 cases, the report shows.

High levels of IgG to PEG were identified in blood samples of individuals with an allergy to the vaccine. Investigators said it’s possible that the BAT results were activated due to IgG via complement activation–related pseudoallergy, or CARPA, as has been hypothesized by some other investigators.

The negative skin prick testing results for PEG, which contrast with the positive BAT results to PEG, suggest that the former may not be appropriate for use as a predictive marker of potential vaccine allergy, according to Dr. Nadeau.

“The take-home message for doctors is to be careful,” she said. “Don’t assume that just because the person skin-tests negative to PEG or to the vaccine itself that you’re out of the woods, because the skin test would be often negative in those scenarios.”

The study was supported by a grants from the Asthma and Allergic Diseases Cooperative Research Centers, a grant from the National Institutes of Health, the National Institute of Allergy and Infectious Disease SARS Vaccine study, the Parker Foundation, the Crown Foundation, and the Sunshine Foundation. Dr. Nadeau reports numerous conflicts with various sources in the industry. Dr. Banerji has disclosed no relevant financial relationships.

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

A common inert ingredient may be the culprit behind the rare allergic reactions reported among individuals who have received mRNA COVID-19 vaccines, according to investigators at a large regional health center that was among the first to administer the shots.

Blood samples from 10 of 11 individuals with suspected allergic reactions reacted to polyethylene glycol (PEG), a component of both the Pfizer and Moderna mRNA  vaccines, according to a report in JAMA Network Open.

In total, only 22 individuals had suspected allergic reactions out of nearly 39,000 mRNA COVID-19 vaccine doses administered, the investigators reported, noting that the reactions were generally mild and all fully resolved.

Those findings should be reassuring to individuals who are reticent to sign up for a COVID-19 vaccine because of fear of an allergic reaction, said study senior author Kari Nadeau, MD, PhD, director of the Parker Center for Allergy and Asthma Research at Stanford (Calif.) University.

“We’re hoping that this word will get out and then that the companies could also think about making vaccines that have other products in them that don’t include polyethylene glycol,” Dr. Nadeau said in an interview.

PEG is a compound used in many products, including pharmaceuticals, cosmetics, and food. In the mRNA COVID-19 vaccines, PEG serves to stabilize the lipid nanoparticles that help protect and transport mRNA. However, its use in this setting has been linked to allergic reactions in this and previous studies.

No immunoglobulin E (IgE) antibodies to PEG were detected among the 22 individuals with suspected allergic reactions to mRNA COVID-19 vaccine, but PEG immunoglobulin G (IgG) was present. That suggests non-IgE mediated allergic reactions to PEG may be implicated for the majority of cases, Dr. Nadeau said.

This case series provides interesting new evidence to confirm previous reports that a mechanism other than the classic IgE-mediated allergic response is behind the suspected allergic reactions that are occurring after mRNA COVID-19 vaccine, said Aleena Banerji, MD, associate professor at Harvard Medical School, Boston, and clinical director of the Drug Allergy Program at Massachusetts General Hospital.

“We need to further understand the mechanism of these reactions, but what we know is that IGE mediated allergy to excipients like PEG is probably not the main cause,” Dr. Banerji, who was not involved in the study, said in an interview.

In a recent research letter published in JAMA Internal Medicine, Dr. Banerji and coauthors reported that all individuals with immediate suspected allergic reactions to mRNA COVID-19 vaccine went on to tolerate the second dose, with mild symptoms reported in the minority of patients (32 out of 159, or about 20%).

“Again, that is very consistent with not having an IgE-mediated allergy, so it seems to all be fitting with that picture,” Dr. Banerji said.

The case series by Dr. Nadeau and coauthors was based on review of nearly 39,000 mRNA COVID-19 vaccine doses administered between December 18, 2020 and January 26, 2021. Most mRNA vaccine recipients were Stanford-affiliated health care workers, according to the report.

Among recipients of those doses, they identified 148 individuals who had anaphylaxis-related ICD-10 codes recorded over the same time period. In a review of medical records, investigators pinpointed 22 individuals as having suspected allergy and invited them to participate in follow-up allergy testing.

A total of 11 individuals underwent skin prick testing, but none of them tested positive to PEG or to polysorbate 80, another excipient that has been linked to vaccine-related allergic reactions. One of the patients tested positive to the same mRNA vaccine they had previously received, according to the report.

Those same 11 individuals also underwent basophil activation testing (BAT). In contrast to the skin testing results, BAT results were positive for PEG in 10 of 11 cases (or 91%) and positive for their administered vaccine in all 11 cases, the report shows.

High levels of IgG to PEG were identified in blood samples of individuals with an allergy to the vaccine. Investigators said it’s possible that the BAT results were activated due to IgG via complement activation–related pseudoallergy, or CARPA, as has been hypothesized by some other investigators.

The negative skin prick testing results for PEG, which contrast with the positive BAT results to PEG, suggest that the former may not be appropriate for use as a predictive marker of potential vaccine allergy, according to Dr. Nadeau.

“The take-home message for doctors is to be careful,” she said. “Don’t assume that just because the person skin-tests negative to PEG or to the vaccine itself that you’re out of the woods, because the skin test would be often negative in those scenarios.”

The study was supported by a grants from the Asthma and Allergic Diseases Cooperative Research Centers, a grant from the National Institutes of Health, the National Institute of Allergy and Infectious Disease SARS Vaccine study, the Parker Foundation, the Crown Foundation, and the Sunshine Foundation. Dr. Nadeau reports numerous conflicts with various sources in the industry. Dr. Banerji has disclosed no relevant financial relationships.

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

A common inert ingredient may be the culprit behind the rare allergic reactions reported among individuals who have received mRNA COVID-19 vaccines, according to investigators at a large regional health center that was among the first to administer the shots.

Blood samples from 10 of 11 individuals with suspected allergic reactions reacted to polyethylene glycol (PEG), a component of both the Pfizer and Moderna mRNA  vaccines, according to a report in JAMA Network Open.

In total, only 22 individuals had suspected allergic reactions out of nearly 39,000 mRNA COVID-19 vaccine doses administered, the investigators reported, noting that the reactions were generally mild and all fully resolved.

Those findings should be reassuring to individuals who are reticent to sign up for a COVID-19 vaccine because of fear of an allergic reaction, said study senior author Kari Nadeau, MD, PhD, director of the Parker Center for Allergy and Asthma Research at Stanford (Calif.) University.

“We’re hoping that this word will get out and then that the companies could also think about making vaccines that have other products in them that don’t include polyethylene glycol,” Dr. Nadeau said in an interview.

PEG is a compound used in many products, including pharmaceuticals, cosmetics, and food. In the mRNA COVID-19 vaccines, PEG serves to stabilize the lipid nanoparticles that help protect and transport mRNA. However, its use in this setting has been linked to allergic reactions in this and previous studies.

No immunoglobulin E (IgE) antibodies to PEG were detected among the 22 individuals with suspected allergic reactions to mRNA COVID-19 vaccine, but PEG immunoglobulin G (IgG) was present. That suggests non-IgE mediated allergic reactions to PEG may be implicated for the majority of cases, Dr. Nadeau said.

This case series provides interesting new evidence to confirm previous reports that a mechanism other than the classic IgE-mediated allergic response is behind the suspected allergic reactions that are occurring after mRNA COVID-19 vaccine, said Aleena Banerji, MD, associate professor at Harvard Medical School, Boston, and clinical director of the Drug Allergy Program at Massachusetts General Hospital.

“We need to further understand the mechanism of these reactions, but what we know is that IGE mediated allergy to excipients like PEG is probably not the main cause,” Dr. Banerji, who was not involved in the study, said in an interview.

In a recent research letter published in JAMA Internal Medicine, Dr. Banerji and coauthors reported that all individuals with immediate suspected allergic reactions to mRNA COVID-19 vaccine went on to tolerate the second dose, with mild symptoms reported in the minority of patients (32 out of 159, or about 20%).

“Again, that is very consistent with not having an IgE-mediated allergy, so it seems to all be fitting with that picture,” Dr. Banerji said.

The case series by Dr. Nadeau and coauthors was based on review of nearly 39,000 mRNA COVID-19 vaccine doses administered between December 18, 2020 and January 26, 2021. Most mRNA vaccine recipients were Stanford-affiliated health care workers, according to the report.

Among recipients of those doses, they identified 148 individuals who had anaphylaxis-related ICD-10 codes recorded over the same time period. In a review of medical records, investigators pinpointed 22 individuals as having suspected allergy and invited them to participate in follow-up allergy testing.

A total of 11 individuals underwent skin prick testing, but none of them tested positive to PEG or to polysorbate 80, another excipient that has been linked to vaccine-related allergic reactions. One of the patients tested positive to the same mRNA vaccine they had previously received, according to the report.

Those same 11 individuals also underwent basophil activation testing (BAT). In contrast to the skin testing results, BAT results were positive for PEG in 10 of 11 cases (or 91%) and positive for their administered vaccine in all 11 cases, the report shows.

High levels of IgG to PEG were identified in blood samples of individuals with an allergy to the vaccine. Investigators said it’s possible that the BAT results were activated due to IgG via complement activation–related pseudoallergy, or CARPA, as has been hypothesized by some other investigators.

The negative skin prick testing results for PEG, which contrast with the positive BAT results to PEG, suggest that the former may not be appropriate for use as a predictive marker of potential vaccine allergy, according to Dr. Nadeau.

“The take-home message for doctors is to be careful,” she said. “Don’t assume that just because the person skin-tests negative to PEG or to the vaccine itself that you’re out of the woods, because the skin test would be often negative in those scenarios.”

The study was supported by a grants from the Asthma and Allergic Diseases Cooperative Research Centers, a grant from the National Institutes of Health, the National Institute of Allergy and Infectious Disease SARS Vaccine study, the Parker Foundation, the Crown Foundation, and the Sunshine Foundation. Dr. Nadeau reports numerous conflicts with various sources in the industry. Dr. Banerji has disclosed no relevant financial relationships.

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

Confusion continues to circulate in the wake of decisions on booster doses of the Pfizer/BioNTech COVID-19 vaccine, all announced within 1 week. Many people – including those now eligible and those who officially have to wait for their shot at a third dose – have questions.

Micah Young/istockphoto.com

Multiple agencies are involved in the booster decisions, and they have put out multiple – and sometimes conflicting – messages about booster doses, leaving more questions than answers for many people.

On Sept. 22, the Food and Drug Administration granted an emergency use authorization (EUA) for a booster dose of the Pfizer mRNA COVID-19 vaccine for those 65 and older and those at high risk for severe illness from the coronavirus, including essential workers whose jobs increase their risk for infection – such as frontline health care workers.

The Centers for Disease Control and Prevention Director Rochelle Walensky, MD, then overruled advice from the agency’s Advisory Committee on Immunization Practices (ACIP) to recommend boosters for essential workers such as those working on the front lines during the pandemic.

As it stands now, the CDC recommends that the following groups should get a third dose of the Pfizer vaccine:

• People aged 65 years and older.
• People aged 18 years and older in long-term care settings.
• People aged 50-64 years with underlying medical conditions.

The CDC also recommends that the following groups may receive a booster shot of the Pfizer vaccine, based on their individual benefits and risks:

• People aged 18-49 years with underlying medical conditions.
• People aged 18-64 years at increased risk for COVID-19 exposure and transmission because of occupational or institutional setting.

The CDC currently considers the following groups at increased risk for COVID-19:

• First responders (health care workers, firefighters, police, congregate care staff).
• Education staff (teachers, support staff, day care workers).
• Food and agriculture workers.
• Manufacturing workers.
• Corrections workers.
• U.S. Postal Service workers.
• Public transit workers.
• Grocery store workers.

Health care professionals, among the most trusted sources of COVID-19 information, are likely to encounter a number of patients wondering how all this will work.

“It’s fantastic that boosters will be available for those who the data supports need [them],” Rachael Piltch-Loeb, PhD, said during a media briefing on Sept. 23, held between the FDA and CDC decisions.

“But we’re really in a place where we have a lot more questions and answers about what the next phase of the vaccine availability and updates are going to be in the United States,” added Dr. Piltch-Loeb, preparedness fellow in the division of policy translation and leadership development and a research associate in the department of biostatistics at the Harvard T. H. Chan School of Public Health in Boston.

To provide some initial answers, this news organization spoke with multiple COVID-19 experts.

1. What is the biggest concern you are hearing from patients about getting a booster?

“The biggest concerns are that everyone wants it and they don’t know where to get it. In health care’s defense, the CDC just figured out what to do,” said Janet Englund, MD, professor of pediatric infectious diseases and an infectious disease and virology expert at Seattle Children’s Hospital in Washington.

“Everyone thinks they should be eligible for a booster ... people in their 50s who are not yet 65+, people with young grandchildren, etc.,” she added. “I’m at Seattle Children’s Hospital, so people are asking about booster shots and about getting their children vaccinated.”

Boosters for all COVID-19 vaccines are completely free.

“All COVID-19 vaccines, including booster doses, will be provided free of charge to the U.S. population,” the CDC has said.

2. Will patients need to prove they meet eligibility criteria for a booster shot or will it be the honor system?

“No, patients will only need to attest that they fall into one of the high-risk groups for whom a booster vaccine is authorized,” said Robert Atmar, MD, professor of infectious diseases at Baylor College of Medicine in Houston.

Dr. Piltch-Loeb agreed. “It is likely to be an honor system. It is very unlikely that there will be punishments or other ramifications ... if doses are administered, beyond the approved usage.”

3. If a patient who had the Moderna or the Johnson and Johnson vaccination requests a booster, can health care workers give them Pfizer? 

The short answer is no. “This only applies to individuals who have received the Pfizer vaccine,” Dr. Piltch-Loeb said.

More data will be needed before other vaccine boosters are authorized, she added.

“My understanding is the Moderna people have just recently submitted their information, all of their data to the FDA and J&J is in line to do that very shortly,” said William Schaffner, MD, professor of preventive medicine and infectious diseases at Vanderbilt University in Nashville, Tenn. “I would hope that within the next month to 6 weeks, we will get information about both of those vaccines,” Dr. Schaffner said.

4. When are the “mix-and-match” vaccine study results expected to come out?

“We expect that data from the study will be available in the coming weeks,” said Dr. Atmar, who is the national co-principal investigator of a mix-and-match booster trial launched in June 2021.

5. Are side effects of a booster vaccine expected to be about the same as what people experienced during their first or second immunization? 

“I’m expecting the side effects will be similar to the second dose,” Dr. Englund said.

“The data presented ... at ACIP suggests that the side effects from the third shot are either the same or actually less than the first two shots,” said Carlos del Rio, MD, distinguished professor of medicine, epidemiology, and global health, and executive associate dean of Emory University School of Medicine at Grady Health System in Atlanta.

”Everyone reacts very differently to vaccines, regardless of vaccine type,” said Eric Ascher, MD, a family medicine physician at Lenox Hill Hospital in New York City. “I have had patients (as well as personal experience) where there were none to minimal symptoms, and others who felt they had a mild flu for 24 hours.”

“I expect no side effects greater than what was felt with you prior doses,” he said. “The vaccine is very safe and the benefit of vaccination outweighs the risks of any mild side effects.”

6. Is it unethical to give a booster to someone outside the approved groups if there are doses remaining at the end of the day in an open vial? 

“Offering a booster shot to someone outside of approved groups if remaining doses will go to waste at the end of the day seems like a prudent decision, and relatively harmless action,” said Faith Fletcher, PhD, assistant professor at the Center for Medical Ethics and Health Policy at Baylor College of Medicine.

“However, if doses continue to fall in the laps of unapproved groups, we must evaluate the vaccine systems and structures that advantage some groups and disadvantage others,” she added. “We know that the distribution of COVID-19 vaccines has not been equitable – and some groups have been left behind.”

“I am not an ethicist and there are many competing concerns that this question addresses,” Dr. Atmar said. For example, “there is not a limitation of vaccine supply in the U.S., so that using leftover vaccine to prevent waste is no longer a major concern in the U.S.”

It could be more of a legal than ethical question, Dr. Atmar said. For an individual outside the authorized groups, legally, the FDA’s EUA for boosting does not allow the vaccine to be administered to this person, he said.

“The rationale for the restricted use in the EUA is that at this time the safety and risks associated with such administration are not known, and the benefits also have not been determined,” Dr. Atmar said. “Members of the ACIP raised concerns about other individuals who may potentially benefit from a booster but are not eligible and the importance of making boosters available to them, but from a legal standpoint – I am also not a lawyer, so this is my understanding – administration of the vaccine is limited to those identified in the EUA.”

7. What is the likelihood that one shot will combine COVID and flu protection in the near future? 

It is not likely, Dr. Englund said. “The reason is that the flu vaccine changes so much, and it already has four different antigens. This is assuming we keep the same method of making the flu vaccine – the answer could be different if the flu vaccine becomes an mRNA vaccine in the future.”

Companies such as Moderna and Novavax are testing single-dose shots for COVID-19 and influenza, but they are still far from having anything ready for this flu season in the United States.

8. Is there any chance a booster shot distributed now will need to be redesigned for a future variant? 

“Absolutely,” Dr. Englund said. “And a booster dose is the time we may want to consider re-engineering a vaccine.”

9. Do you think the FDA/CDC limitations on who is eligible for a booster was in any way influenced by the World Health Organization call for prioritizing shots for the unvaccinated in lower-resource countries?

“This is absolutely still a global problem,” Dr. Piltch-Loeb said. “We need to get more vaccine to more countries and more people as soon as possible, because if there’s anything we’ve seen about the variants it is that ... they can come from all different places.”

“That being said, I think that it is unlikely to change the course of action in the U.S.,” she added, when it comes to comparing the global need with the domestic policy priorities of the administration.

Dr. Atmar was more direct. “No,” he said. “The WHO recommends against boosting of anyone. The U.S. decisions about boosting those in this country who are eligible are aimed toward addressing perceived needs domestically at the same time that vaccines are being provided to other countries.

“The philosophy is to address both ‘needs’ at the same time,” Dr. Atmar said.

10. What does the future hold for booster shots?

“Predicting the future is really hard, especially when it involves COVID,” Dr. del Rio said. 

“Having said that, COVID is not the flu, so I doubt there will be need for annual boosters. I think the population eligible for boosters will be expanded ... and the major population not addressed at this point is the people that received either Moderna or J&J [vaccines].”
 

Kelly Davis contributed to this feature. A version of this article first appeared on Medscape.com.

Confusion continues to circulate in the wake of decisions on booster doses of the Pfizer/BioNTech COVID-19 vaccine, all announced within 1 week. Many people – including those now eligible and those who officially have to wait for their shot at a third dose – have questions.

Micah Young/istockphoto.com

Multiple agencies are involved in the booster decisions, and they have put out multiple – and sometimes conflicting – messages about booster doses, leaving more questions than answers for many people.

On Sept. 22, the Food and Drug Administration granted an emergency use authorization (EUA) for a booster dose of the Pfizer mRNA COVID-19 vaccine for those 65 and older and those at high risk for severe illness from the coronavirus, including essential workers whose jobs increase their risk for infection – such as frontline health care workers.

The Centers for Disease Control and Prevention Director Rochelle Walensky, MD, then overruled advice from the agency’s Advisory Committee on Immunization Practices (ACIP) to recommend boosters for essential workers such as those working on the front lines during the pandemic.

As it stands now, the CDC recommends that the following groups should get a third dose of the Pfizer vaccine:

• People aged 65 years and older.
• People aged 18 years and older in long-term care settings.
• People aged 50-64 years with underlying medical conditions.

The CDC also recommends that the following groups may receive a booster shot of the Pfizer vaccine, based on their individual benefits and risks:

• People aged 18-49 years with underlying medical conditions.
• People aged 18-64 years at increased risk for COVID-19 exposure and transmission because of occupational or institutional setting.

The CDC currently considers the following groups at increased risk for COVID-19:

• First responders (health care workers, firefighters, police, congregate care staff).
• Education staff (teachers, support staff, day care workers).
• Food and agriculture workers.
• Manufacturing workers.
• Corrections workers.
• U.S. Postal Service workers.
• Public transit workers.
• Grocery store workers.

Health care professionals, among the most trusted sources of COVID-19 information, are likely to encounter a number of patients wondering how all this will work.

“It’s fantastic that boosters will be available for those who the data supports need [them],” Rachael Piltch-Loeb, PhD, said during a media briefing on Sept. 23, held between the FDA and CDC decisions.

“But we’re really in a place where we have a lot more questions and answers about what the next phase of the vaccine availability and updates are going to be in the United States,” added Dr. Piltch-Loeb, preparedness fellow in the division of policy translation and leadership development and a research associate in the department of biostatistics at the Harvard T. H. Chan School of Public Health in Boston.

To provide some initial answers, this news organization spoke with multiple COVID-19 experts.

1. What is the biggest concern you are hearing from patients about getting a booster?

“The biggest concerns are that everyone wants it and they don’t know where to get it. In health care’s defense, the CDC just figured out what to do,” said Janet Englund, MD, professor of pediatric infectious diseases and an infectious disease and virology expert at Seattle Children’s Hospital in Washington.

“Everyone thinks they should be eligible for a booster ... people in their 50s who are not yet 65+, people with young grandchildren, etc.,” she added. “I’m at Seattle Children’s Hospital, so people are asking about booster shots and about getting their children vaccinated.”

Boosters for all COVID-19 vaccines are completely free.

“All COVID-19 vaccines, including booster doses, will be provided free of charge to the U.S. population,” the CDC has said.

2. Will patients need to prove they meet eligibility criteria for a booster shot or will it be the honor system?

“No, patients will only need to attest that they fall into one of the high-risk groups for whom a booster vaccine is authorized,” said Robert Atmar, MD, professor of infectious diseases at Baylor College of Medicine in Houston.

Dr. Piltch-Loeb agreed. “It is likely to be an honor system. It is very unlikely that there will be punishments or other ramifications ... if doses are administered, beyond the approved usage.”

3. If a patient who had the Moderna or the Johnson and Johnson vaccination requests a booster, can health care workers give them Pfizer? 

The short answer is no. “This only applies to individuals who have received the Pfizer vaccine,” Dr. Piltch-Loeb said.

More data will be needed before other vaccine boosters are authorized, she added.

“My understanding is the Moderna people have just recently submitted their information, all of their data to the FDA and J&J is in line to do that very shortly,” said William Schaffner, MD, professor of preventive medicine and infectious diseases at Vanderbilt University in Nashville, Tenn. “I would hope that within the next month to 6 weeks, we will get information about both of those vaccines,” Dr. Schaffner said.

4. When are the “mix-and-match” vaccine study results expected to come out?

“We expect that data from the study will be available in the coming weeks,” said Dr. Atmar, who is the national co-principal investigator of a mix-and-match booster trial launched in June 2021.

5. Are side effects of a booster vaccine expected to be about the same as what people experienced during their first or second immunization? 

“I’m expecting the side effects will be similar to the second dose,” Dr. Englund said.

“The data presented ... at ACIP suggests that the side effects from the third shot are either the same or actually less than the first two shots,” said Carlos del Rio, MD, distinguished professor of medicine, epidemiology, and global health, and executive associate dean of Emory University School of Medicine at Grady Health System in Atlanta.

”Everyone reacts very differently to vaccines, regardless of vaccine type,” said Eric Ascher, MD, a family medicine physician at Lenox Hill Hospital in New York City. “I have had patients (as well as personal experience) where there were none to minimal symptoms, and others who felt they had a mild flu for 24 hours.”

“I expect no side effects greater than what was felt with you prior doses,” he said. “The vaccine is very safe and the benefit of vaccination outweighs the risks of any mild side effects.”

6. Is it unethical to give a booster to someone outside the approved groups if there are doses remaining at the end of the day in an open vial? 

“Offering a booster shot to someone outside of approved groups if remaining doses will go to waste at the end of the day seems like a prudent decision, and relatively harmless action,” said Faith Fletcher, PhD, assistant professor at the Center for Medical Ethics and Health Policy at Baylor College of Medicine.

“However, if doses continue to fall in the laps of unapproved groups, we must evaluate the vaccine systems and structures that advantage some groups and disadvantage others,” she added. “We know that the distribution of COVID-19 vaccines has not been equitable – and some groups have been left behind.”

“I am not an ethicist and there are many competing concerns that this question addresses,” Dr. Atmar said. For example, “there is not a limitation of vaccine supply in the U.S., so that using leftover vaccine to prevent waste is no longer a major concern in the U.S.”

It could be more of a legal than ethical question, Dr. Atmar said. For an individual outside the authorized groups, legally, the FDA’s EUA for boosting does not allow the vaccine to be administered to this person, he said.

“The rationale for the restricted use in the EUA is that at this time the safety and risks associated with such administration are not known, and the benefits also have not been determined,” Dr. Atmar said. “Members of the ACIP raised concerns about other individuals who may potentially benefit from a booster but are not eligible and the importance of making boosters available to them, but from a legal standpoint – I am also not a lawyer, so this is my understanding – administration of the vaccine is limited to those identified in the EUA.”

7. What is the likelihood that one shot will combine COVID and flu protection in the near future? 

It is not likely, Dr. Englund said. “The reason is that the flu vaccine changes so much, and it already has four different antigens. This is assuming we keep the same method of making the flu vaccine – the answer could be different if the flu vaccine becomes an mRNA vaccine in the future.”

Companies such as Moderna and Novavax are testing single-dose shots for COVID-19 and influenza, but they are still far from having anything ready for this flu season in the United States.

8. Is there any chance a booster shot distributed now will need to be redesigned for a future variant? 

“Absolutely,” Dr. Englund said. “And a booster dose is the time we may want to consider re-engineering a vaccine.”

9. Do you think the FDA/CDC limitations on who is eligible for a booster was in any way influenced by the World Health Organization call for prioritizing shots for the unvaccinated in lower-resource countries?

“This is absolutely still a global problem,” Dr. Piltch-Loeb said. “We need to get more vaccine to more countries and more people as soon as possible, because if there’s anything we’ve seen about the variants it is that ... they can come from all different places.”

“That being said, I think that it is unlikely to change the course of action in the U.S.,” she added, when it comes to comparing the global need with the domestic policy priorities of the administration.

Dr. Atmar was more direct. “No,” he said. “The WHO recommends against boosting of anyone. The U.S. decisions about boosting those in this country who are eligible are aimed toward addressing perceived needs domestically at the same time that vaccines are being provided to other countries.

“The philosophy is to address both ‘needs’ at the same time,” Dr. Atmar said.

10. What does the future hold for booster shots?

“Predicting the future is really hard, especially when it involves COVID,” Dr. del Rio said. 

“Having said that, COVID is not the flu, so I doubt there will be need for annual boosters. I think the population eligible for boosters will be expanded ... and the major population not addressed at this point is the people that received either Moderna or J&J [vaccines].”
 

Kelly Davis contributed to this feature. A version of this article first appeared on Medscape.com.

Confusion continues to circulate in the wake of decisions on booster doses of the Pfizer/BioNTech COVID-19 vaccine, all announced within 1 week. Many people – including those now eligible and those who officially have to wait for their shot at a third dose – have questions.

Micah Young/istockphoto.com

Multiple agencies are involved in the booster decisions, and they have put out multiple – and sometimes conflicting – messages about booster doses, leaving more questions than answers for many people.

On Sept. 22, the Food and Drug Administration granted an emergency use authorization (EUA) for a booster dose of the Pfizer mRNA COVID-19 vaccine for those 65 and older and those at high risk for severe illness from the coronavirus, including essential workers whose jobs increase their risk for infection – such as frontline health care workers.

The Centers for Disease Control and Prevention Director Rochelle Walensky, MD, then overruled advice from the agency’s Advisory Committee on Immunization Practices (ACIP) to recommend boosters for essential workers such as those working on the front lines during the pandemic.

As it stands now, the CDC recommends that the following groups should get a third dose of the Pfizer vaccine:

• People aged 65 years and older.
• People aged 18 years and older in long-term care settings.
• People aged 50-64 years with underlying medical conditions.

The CDC also recommends that the following groups may receive a booster shot of the Pfizer vaccine, based on their individual benefits and risks:

• People aged 18-49 years with underlying medical conditions.
• People aged 18-64 years at increased risk for COVID-19 exposure and transmission because of occupational or institutional setting.

The CDC currently considers the following groups at increased risk for COVID-19:

• First responders (health care workers, firefighters, police, congregate care staff).
• Education staff (teachers, support staff, day care workers).
• Food and agriculture workers.
• Manufacturing workers.
• Corrections workers.
• U.S. Postal Service workers.
• Public transit workers.
• Grocery store workers.

Health care professionals, among the most trusted sources of COVID-19 information, are likely to encounter a number of patients wondering how all this will work.

“It’s fantastic that boosters will be available for those who the data supports need [them],” Rachael Piltch-Loeb, PhD, said during a media briefing on Sept. 23, held between the FDA and CDC decisions.

“But we’re really in a place where we have a lot more questions and answers about what the next phase of the vaccine availability and updates are going to be in the United States,” added Dr. Piltch-Loeb, preparedness fellow in the division of policy translation and leadership development and a research associate in the department of biostatistics at the Harvard T. H. Chan School of Public Health in Boston.

To provide some initial answers, this news organization spoke with multiple COVID-19 experts.

1. What is the biggest concern you are hearing from patients about getting a booster?

“The biggest concerns are that everyone wants it and they don’t know where to get it. In health care’s defense, the CDC just figured out what to do,” said Janet Englund, MD, professor of pediatric infectious diseases and an infectious disease and virology expert at Seattle Children’s Hospital in Washington.

“Everyone thinks they should be eligible for a booster ... people in their 50s who are not yet 65+, people with young grandchildren, etc.,” she added. “I’m at Seattle Children’s Hospital, so people are asking about booster shots and about getting their children vaccinated.”

Boosters for all COVID-19 vaccines are completely free.

“All COVID-19 vaccines, including booster doses, will be provided free of charge to the U.S. population,” the CDC has said.

2. Will patients need to prove they meet eligibility criteria for a booster shot or will it be the honor system?

“No, patients will only need to attest that they fall into one of the high-risk groups for whom a booster vaccine is authorized,” said Robert Atmar, MD, professor of infectious diseases at Baylor College of Medicine in Houston.

Dr. Piltch-Loeb agreed. “It is likely to be an honor system. It is very unlikely that there will be punishments or other ramifications ... if doses are administered, beyond the approved usage.”

3. If a patient who had the Moderna or the Johnson and Johnson vaccination requests a booster, can health care workers give them Pfizer? 

The short answer is no. “This only applies to individuals who have received the Pfizer vaccine,” Dr. Piltch-Loeb said.

More data will be needed before other vaccine boosters are authorized, she added.

“My understanding is the Moderna people have just recently submitted their information, all of their data to the FDA and J&J is in line to do that very shortly,” said William Schaffner, MD, professor of preventive medicine and infectious diseases at Vanderbilt University in Nashville, Tenn. “I would hope that within the next month to 6 weeks, we will get information about both of those vaccines,” Dr. Schaffner said.

4. When are the “mix-and-match” vaccine study results expected to come out?

“We expect that data from the study will be available in the coming weeks,” said Dr. Atmar, who is the national co-principal investigator of a mix-and-match booster trial launched in June 2021.

5. Are side effects of a booster vaccine expected to be about the same as what people experienced during their first or second immunization? 

“I’m expecting the side effects will be similar to the second dose,” Dr. Englund said.

“The data presented ... at ACIP suggests that the side effects from the third shot are either the same or actually less than the first two shots,” said Carlos del Rio, MD, distinguished professor of medicine, epidemiology, and global health, and executive associate dean of Emory University School of Medicine at Grady Health System in Atlanta.

”Everyone reacts very differently to vaccines, regardless of vaccine type,” said Eric Ascher, MD, a family medicine physician at Lenox Hill Hospital in New York City. “I have had patients (as well as personal experience) where there were none to minimal symptoms, and others who felt they had a mild flu for 24 hours.”

“I expect no side effects greater than what was felt with you prior doses,” he said. “The vaccine is very safe and the benefit of vaccination outweighs the risks of any mild side effects.”

6. Is it unethical to give a booster to someone outside the approved groups if there are doses remaining at the end of the day in an open vial? 

“Offering a booster shot to someone outside of approved groups if remaining doses will go to waste at the end of the day seems like a prudent decision, and relatively harmless action,” said Faith Fletcher, PhD, assistant professor at the Center for Medical Ethics and Health Policy at Baylor College of Medicine.

“However, if doses continue to fall in the laps of unapproved groups, we must evaluate the vaccine systems and structures that advantage some groups and disadvantage others,” she added. “We know that the distribution of COVID-19 vaccines has not been equitable – and some groups have been left behind.”

“I am not an ethicist and there are many competing concerns that this question addresses,” Dr. Atmar said. For example, “there is not a limitation of vaccine supply in the U.S., so that using leftover vaccine to prevent waste is no longer a major concern in the U.S.”

It could be more of a legal than ethical question, Dr. Atmar said. For an individual outside the authorized groups, legally, the FDA’s EUA for boosting does not allow the vaccine to be administered to this person, he said.

“The rationale for the restricted use in the EUA is that at this time the safety and risks associated with such administration are not known, and the benefits also have not been determined,” Dr. Atmar said. “Members of the ACIP raised concerns about other individuals who may potentially benefit from a booster but are not eligible and the importance of making boosters available to them, but from a legal standpoint – I am also not a lawyer, so this is my understanding – administration of the vaccine is limited to those identified in the EUA.”

7. What is the likelihood that one shot will combine COVID and flu protection in the near future? 

It is not likely, Dr. Englund said. “The reason is that the flu vaccine changes so much, and it already has four different antigens. This is assuming we keep the same method of making the flu vaccine – the answer could be different if the flu vaccine becomes an mRNA vaccine in the future.”

Companies such as Moderna and Novavax are testing single-dose shots for COVID-19 and influenza, but they are still far from having anything ready for this flu season in the United States.

8. Is there any chance a booster shot distributed now will need to be redesigned for a future variant? 

“Absolutely,” Dr. Englund said. “And a booster dose is the time we may want to consider re-engineering a vaccine.”

9. Do you think the FDA/CDC limitations on who is eligible for a booster was in any way influenced by the World Health Organization call for prioritizing shots for the unvaccinated in lower-resource countries?

“This is absolutely still a global problem,” Dr. Piltch-Loeb said. “We need to get more vaccine to more countries and more people as soon as possible, because if there’s anything we’ve seen about the variants it is that ... they can come from all different places.”

“That being said, I think that it is unlikely to change the course of action in the U.S.,” she added, when it comes to comparing the global need with the domestic policy priorities of the administration.

Dr. Atmar was more direct. “No,” he said. “The WHO recommends against boosting of anyone. The U.S. decisions about boosting those in this country who are eligible are aimed toward addressing perceived needs domestically at the same time that vaccines are being provided to other countries.

“The philosophy is to address both ‘needs’ at the same time,” Dr. Atmar said.

10. What does the future hold for booster shots?

“Predicting the future is really hard, especially when it involves COVID,” Dr. del Rio said. 

“Having said that, COVID is not the flu, so I doubt there will be need for annual boosters. I think the population eligible for boosters will be expanded ... and the major population not addressed at this point is the people that received either Moderna or J&J [vaccines].”
 

Kelly Davis contributed to this feature. A version of this article first appeared on Medscape.com.

While sick at home with a 26-day symptomatic course of COVID-19 in March 2020, I watched the surge unfold in my state and the hospital where I work as an inpatient adult medicine physician. Although the preponderance of my professional life is dedicated to leading teams in implementing delivery system transformation, the hat I wore in that moment involved living through and keeping up with the changes around me. Once I recovered and returned to the arena as a COVID doctor, I adapted to and made changes during constant shifts in how we provided care.

Looking back on those months during the worst of the COVID-19 hospital surge in my region, I reflect on the factors that helped me, as a frontline and shift-work clinician, adapt to and make those changes. In reflecting on the elements that were meaningful to me during the crisis, I recognize a set of change-enabling factors that have broad relevance for those of us who work to improve outcomes for patients and populations.

Confidence engendered by liberating data

In the early days of the surge, there was much uncertainty, and unfortunately, some seriously imperfect messaging. Trust was broken or badly bruised for many frontline clinicians. I share this painful phase not to criticize, but rather reflect on what mattered to me during that crisis of confidence. It was data. Raw, unadjusted, best-available data. Produced and pushed out. Available, trended over time, telling the story of where we are, now. Counts of tests, beds, and ventilators. The consistent, transparent availability of relevant and straightforward data provided an active antidote to a sense of uncertainty during a crisis of confidence.

Personal practice change stimulated by relevance and urgency

For half a decade, I have been encouraging interdisciplinary inpatient teams to identify and actively engage the family and/or care partner as a member of the care team. Despite even the American Association of Retired Persons mobilizing an impressive regulatory approach in 32 states to require that family and/or care partners are included as such, the practice change efforts continued on a slow and steady path. Why? We just didn’t believe it was of urgent, relevant, mission-critical importance to our daily practice to do so. That all changed in March 2020.

Without needing to be told, educated, or incentivized, my first night as a COVID doctor found me calling every single patient’s family upon admission, regardless of what time it was. It was critical to review the diagnosis, transparently discuss the uncertainty regarding the upcoming hours and days, review the potential contingencies, and ask, right there and then, whether intubation is consistent with goals of care. It was that urgent and relevant. Without exception, families were grateful for the effort and candor.

The significance of this practice—undoubtedly adopted by every inpatient provider who has worked a COVID surge—is rooted in decades of academic deliberation on which is the “right” doctor to have these discussions. None of that mattered. Historical opinions changed due to what was urgent and relevant given the situation at hand and the job we had to do. Imagine, for example, what we could do and how we could change if we now consider it urgent and relevant to identify and mobilize enhanced services and supports to patients who experience inequities because we believe it to be mission-critical to the job we show up to do every day.

Change fostered by a creative problem-solving ecosystem

Embracing personal practice change was made easier and implicitly affirmed by the creative problem solving that occurred everywhere. Tents, drive-throughs, and even college field houses were now settings of care. Primary care physicians, cardiologists, and gastrointestinal (GI) and postanesthesia care nurses staffed the COVID floors. Rolling stands held iPads so staff could communicate with patients without entering the room. This creative ecosystem fostered individual practice change. No debates were needed to recognize that standard processes were inadequate. No single role or service of any discipline was singularly asked to change to meet the needs of the moment. Because of this ecosystem of creative, active change, there was a much greater flexibility among individuals, role types, departments, and disciplines to change. This is particularly poignant to me in light of the work I lead to improve care for patients who experience systemic inequities in our health care system. When we ask a single role type or discipline to change, it can be met with resistance; far more success is achieved when we engage an interdisciplinary and interdepartmental approach to change. When surrounded by others making change, it makes us more willing to change, too.

It is so often invoked that health care is a team sport. In practicality, while we may aspire to work as a team, health care delivery is still all too often comprised of a set of individual actors with individualized responsibilities trying to communicate the best they can with each other.

What I experienced during the surge at my hospital was the very best version of teamwork I have ever been a part of in health care: empathetic, mutually interdependent strangers coming together during daily changes in staffing, processes, and resources. I will never forget nights walking into the pediatric floor or day surgery recovery area—now repurposed as a COVID unit—to entirely new faces comprised of GI suite nurses, outpatient doctors, and moonlighting intensivists.

We were all new to each other, all new to working in this setting, and all new to whatever the newest changes of the day brought. I will never forget how we greeted each other and introduced ourselves. We asked each other where we were “from,” and held a genuine appreciation to each other for being there. Imagine how this impacted how we worked together. Looking back on those night shifts, I remember us as a truly interdependent team. I will endeavor to bring that sense of mutual regard and interdependency into my work to foster effective interdisciplinary and cross-continuum teamwork.

Takeaways

As a student and practitioner of delivery system transformation, I am often in conversations about imperfect data, incomplete evidence, and role-specific and organizational resistance to change. As an acute care provider during the COVID-19 hospital surge in my region, the experiences I had as a participant in the COVID-related delivery system change will stay with me as I lead value-based delivery system change. What worked in an infectious disease crisis holds great relevance to our pressing, urgent, relevant work to create a more person-centered, equitable, and value-based delivery system.

I am confident that if those of us seeking to improve outcomes use visible and accessible data to engender confidence, clearly link practice change to the relevant and urgent issue at hand, promote broadly visible creative problem solving to foster an ecosystem of change, and cultivate empathy and mutual interdependence to promote the teamwork we aspire to have, that we will foster meaningful progress in our efforts to improve care for patients and populations.

Corresponding author: Amy Boutwell, MD, MPP, President, Collaborative Healthcare Strategies, Lexington, MA; [email protected].

Financial disclosures: None.

While sick at home with a 26-day symptomatic course of COVID-19 in March 2020, I watched the surge unfold in my state and the hospital where I work as an inpatient adult medicine physician. Although the preponderance of my professional life is dedicated to leading teams in implementing delivery system transformation, the hat I wore in that moment involved living through and keeping up with the changes around me. Once I recovered and returned to the arena as a COVID doctor, I adapted to and made changes during constant shifts in how we provided care.

Looking back on those months during the worst of the COVID-19 hospital surge in my region, I reflect on the factors that helped me, as a frontline and shift-work clinician, adapt to and make those changes. In reflecting on the elements that were meaningful to me during the crisis, I recognize a set of change-enabling factors that have broad relevance for those of us who work to improve outcomes for patients and populations.

Confidence engendered by liberating data

In the early days of the surge, there was much uncertainty, and unfortunately, some seriously imperfect messaging. Trust was broken or badly bruised for many frontline clinicians. I share this painful phase not to criticize, but rather reflect on what mattered to me during that crisis of confidence. It was data. Raw, unadjusted, best-available data. Produced and pushed out. Available, trended over time, telling the story of where we are, now. Counts of tests, beds, and ventilators. The consistent, transparent availability of relevant and straightforward data provided an active antidote to a sense of uncertainty during a crisis of confidence.

Personal practice change stimulated by relevance and urgency

For half a decade, I have been encouraging interdisciplinary inpatient teams to identify and actively engage the family and/or care partner as a member of the care team. Despite even the American Association of Retired Persons mobilizing an impressive regulatory approach in 32 states to require that family and/or care partners are included as such, the practice change efforts continued on a slow and steady path. Why? We just didn’t believe it was of urgent, relevant, mission-critical importance to our daily practice to do so. That all changed in March 2020.

Without needing to be told, educated, or incentivized, my first night as a COVID doctor found me calling every single patient’s family upon admission, regardless of what time it was. It was critical to review the diagnosis, transparently discuss the uncertainty regarding the upcoming hours and days, review the potential contingencies, and ask, right there and then, whether intubation is consistent with goals of care. It was that urgent and relevant. Without exception, families were grateful for the effort and candor.

The significance of this practice—undoubtedly adopted by every inpatient provider who has worked a COVID surge—is rooted in decades of academic deliberation on which is the “right” doctor to have these discussions. None of that mattered. Historical opinions changed due to what was urgent and relevant given the situation at hand and the job we had to do. Imagine, for example, what we could do and how we could change if we now consider it urgent and relevant to identify and mobilize enhanced services and supports to patients who experience inequities because we believe it to be mission-critical to the job we show up to do every day.

Change fostered by a creative problem-solving ecosystem

Embracing personal practice change was made easier and implicitly affirmed by the creative problem solving that occurred everywhere. Tents, drive-throughs, and even college field houses were now settings of care. Primary care physicians, cardiologists, and gastrointestinal (GI) and postanesthesia care nurses staffed the COVID floors. Rolling stands held iPads so staff could communicate with patients without entering the room. This creative ecosystem fostered individual practice change. No debates were needed to recognize that standard processes were inadequate. No single role or service of any discipline was singularly asked to change to meet the needs of the moment. Because of this ecosystem of creative, active change, there was a much greater flexibility among individuals, role types, departments, and disciplines to change. This is particularly poignant to me in light of the work I lead to improve care for patients who experience systemic inequities in our health care system. When we ask a single role type or discipline to change, it can be met with resistance; far more success is achieved when we engage an interdisciplinary and interdepartmental approach to change. When surrounded by others making change, it makes us more willing to change, too.

It is so often invoked that health care is a team sport. In practicality, while we may aspire to work as a team, health care delivery is still all too often comprised of a set of individual actors with individualized responsibilities trying to communicate the best they can with each other.

What I experienced during the surge at my hospital was the very best version of teamwork I have ever been a part of in health care: empathetic, mutually interdependent strangers coming together during daily changes in staffing, processes, and resources. I will never forget nights walking into the pediatric floor or day surgery recovery area—now repurposed as a COVID unit—to entirely new faces comprised of GI suite nurses, outpatient doctors, and moonlighting intensivists.

We were all new to each other, all new to working in this setting, and all new to whatever the newest changes of the day brought. I will never forget how we greeted each other and introduced ourselves. We asked each other where we were “from,” and held a genuine appreciation to each other for being there. Imagine how this impacted how we worked together. Looking back on those night shifts, I remember us as a truly interdependent team. I will endeavor to bring that sense of mutual regard and interdependency into my work to foster effective interdisciplinary and cross-continuum teamwork.

Takeaways

As a student and practitioner of delivery system transformation, I am often in conversations about imperfect data, incomplete evidence, and role-specific and organizational resistance to change. As an acute care provider during the COVID-19 hospital surge in my region, the experiences I had as a participant in the COVID-related delivery system change will stay with me as I lead value-based delivery system change. What worked in an infectious disease crisis holds great relevance to our pressing, urgent, relevant work to create a more person-centered, equitable, and value-based delivery system.

I am confident that if those of us seeking to improve outcomes use visible and accessible data to engender confidence, clearly link practice change to the relevant and urgent issue at hand, promote broadly visible creative problem solving to foster an ecosystem of change, and cultivate empathy and mutual interdependence to promote the teamwork we aspire to have, that we will foster meaningful progress in our efforts to improve care for patients and populations.

Corresponding author: Amy Boutwell, MD, MPP, President, Collaborative Healthcare Strategies, Lexington, MA; [email protected].

Financial disclosures: None.

While sick at home with a 26-day symptomatic course of COVID-19 in March 2020, I watched the surge unfold in my state and the hospital where I work as an inpatient adult medicine physician. Although the preponderance of my professional life is dedicated to leading teams in implementing delivery system transformation, the hat I wore in that moment involved living through and keeping up with the changes around me. Once I recovered and returned to the arena as a COVID doctor, I adapted to and made changes during constant shifts in how we provided care.

Looking back on those months during the worst of the COVID-19 hospital surge in my region, I reflect on the factors that helped me, as a frontline and shift-work clinician, adapt to and make those changes. In reflecting on the elements that were meaningful to me during the crisis, I recognize a set of change-enabling factors that have broad relevance for those of us who work to improve outcomes for patients and populations.

Confidence engendered by liberating data

In the early days of the surge, there was much uncertainty, and unfortunately, some seriously imperfect messaging. Trust was broken or badly bruised for many frontline clinicians. I share this painful phase not to criticize, but rather reflect on what mattered to me during that crisis of confidence. It was data. Raw, unadjusted, best-available data. Produced and pushed out. Available, trended over time, telling the story of where we are, now. Counts of tests, beds, and ventilators. The consistent, transparent availability of relevant and straightforward data provided an active antidote to a sense of uncertainty during a crisis of confidence.

Personal practice change stimulated by relevance and urgency

For half a decade, I have been encouraging interdisciplinary inpatient teams to identify and actively engage the family and/or care partner as a member of the care team. Despite even the American Association of Retired Persons mobilizing an impressive regulatory approach in 32 states to require that family and/or care partners are included as such, the practice change efforts continued on a slow and steady path. Why? We just didn’t believe it was of urgent, relevant, mission-critical importance to our daily practice to do so. That all changed in March 2020.

Without needing to be told, educated, or incentivized, my first night as a COVID doctor found me calling every single patient’s family upon admission, regardless of what time it was. It was critical to review the diagnosis, transparently discuss the uncertainty regarding the upcoming hours and days, review the potential contingencies, and ask, right there and then, whether intubation is consistent with goals of care. It was that urgent and relevant. Without exception, families were grateful for the effort and candor.

The significance of this practice—undoubtedly adopted by every inpatient provider who has worked a COVID surge—is rooted in decades of academic deliberation on which is the “right” doctor to have these discussions. None of that mattered. Historical opinions changed due to what was urgent and relevant given the situation at hand and the job we had to do. Imagine, for example, what we could do and how we could change if we now consider it urgent and relevant to identify and mobilize enhanced services and supports to patients who experience inequities because we believe it to be mission-critical to the job we show up to do every day.

Change fostered by a creative problem-solving ecosystem

Embracing personal practice change was made easier and implicitly affirmed by the creative problem solving that occurred everywhere. Tents, drive-throughs, and even college field houses were now settings of care. Primary care physicians, cardiologists, and gastrointestinal (GI) and postanesthesia care nurses staffed the COVID floors. Rolling stands held iPads so staff could communicate with patients without entering the room. This creative ecosystem fostered individual practice change. No debates were needed to recognize that standard processes were inadequate. No single role or service of any discipline was singularly asked to change to meet the needs of the moment. Because of this ecosystem of creative, active change, there was a much greater flexibility among individuals, role types, departments, and disciplines to change. This is particularly poignant to me in light of the work I lead to improve care for patients who experience systemic inequities in our health care system. When we ask a single role type or discipline to change, it can be met with resistance; far more success is achieved when we engage an interdisciplinary and interdepartmental approach to change. When surrounded by others making change, it makes us more willing to change, too.

It is so often invoked that health care is a team sport. In practicality, while we may aspire to work as a team, health care delivery is still all too often comprised of a set of individual actors with individualized responsibilities trying to communicate the best they can with each other.

What I experienced during the surge at my hospital was the very best version of teamwork I have ever been a part of in health care: empathetic, mutually interdependent strangers coming together during daily changes in staffing, processes, and resources. I will never forget nights walking into the pediatric floor or day surgery recovery area—now repurposed as a COVID unit—to entirely new faces comprised of GI suite nurses, outpatient doctors, and moonlighting intensivists.

We were all new to each other, all new to working in this setting, and all new to whatever the newest changes of the day brought. I will never forget how we greeted each other and introduced ourselves. We asked each other where we were “from,” and held a genuine appreciation to each other for being there. Imagine how this impacted how we worked together. Looking back on those night shifts, I remember us as a truly interdependent team. I will endeavor to bring that sense of mutual regard and interdependency into my work to foster effective interdisciplinary and cross-continuum teamwork.

Takeaways

As a student and practitioner of delivery system transformation, I am often in conversations about imperfect data, incomplete evidence, and role-specific and organizational resistance to change. As an acute care provider during the COVID-19 hospital surge in my region, the experiences I had as a participant in the COVID-related delivery system change will stay with me as I lead value-based delivery system change. What worked in an infectious disease crisis holds great relevance to our pressing, urgent, relevant work to create a more person-centered, equitable, and value-based delivery system.

I am confident that if those of us seeking to improve outcomes use visible and accessible data to engender confidence, clearly link practice change to the relevant and urgent issue at hand, promote broadly visible creative problem solving to foster an ecosystem of change, and cultivate empathy and mutual interdependence to promote the teamwork we aspire to have, that we will foster meaningful progress in our efforts to improve care for patients and populations.

Corresponding author: Amy Boutwell, MD, MPP, President, Collaborative Healthcare Strategies, Lexington, MA; [email protected].

Financial disclosures: None.