Vaccines

Persistent human papillomavirus (HPV) 16 and HPV 18 during a pregnancy may be associated with an increased risk of premature birth.

Findings published online in JAMA Network Open found that 15.9% of individuals who had a persistent HPV 16 or 18 infection during the first and third trimesters of their pregnancy gave birth prematurely, compared with 5.6% of those who did not have an HPV infection at all.

The findings prompted the question of “the pathophysiology of HPV in pregnancy and how the virus is affecting the placenta,” said Lisette Davidson Tanner, MD, MPH, FACOG, who was not involved in the study.

Researchers said the findings are the first to show the association between preterm birth and HPV, which is an incurable virus that most sexually active individuals will get at some point in their lives, according to the Centers for Disease Control and Prevention.

“The results of this study are very important in helping us understand the burden caused by HPV in pregnancy,” study author Helen Trottier, MSc, PhD, researcher at the Centre Hospitalier Universitaire Sainte-Justine, said in an interview. “We may have just pinpointed an important cause of preterm birth that has so far been unexplained.”

Dr. Trottier and colleagues examined data from 1,052 pregnant women from three university-affiliated health care centers in Montreal between Nov. 8, 2010, and Oct. 16, 2016.

Only 5.6% of those who did not have an HPV infection had a premature birth, compared with 6.9% of those who tested positive for any HPV infection in the first trimester.

When looking at the first trimester, researchers found 12% of those diagnosed with HPV 16 and 18 had a preterm birth, compared to 4.9% of those who had a high-risk HPV infection other than HPV 16/18. When looking at the third trimester, researchers found that 15.9% of those with HPV 16/18 had an increased risk of giving birth prematurely, compared to those who had other high-risk HPV infections.

When researchers looked at the persistence of these HPV infections, they found that most HPV infections detected in the first trimester persist to the third trimester. The findings also revealed that persistent vaginal HPV 16/18 detection was significantly associated with all preterm births and spontaneous preterm births. This association was also found among those who had HPV infections detected in their placentas.

Meanwhile, 5.8% of those who had an HPV infection only during the first trimester experienced a preterm birth.

The researchers also found that HPV infections were frequent in pregnancy even among populations “considered to be at low risk based on sociodemographic and sexual history characteristics,” they wrote. Dr. Trottier said she hopes the findings will strengthen support for HPV vaccination.

Dr. Trottier’s study adds to a growing body of research regarding the adverse effects of HPV, according to Dr. Tanner, assistant professor of gynecology and obstetrics at Emory University, Atlanta. “It is already well known that HPV is associated with a number of anogenital and oropharyngeal cancers,” Dr. Tanner said in an interview. “The potential association with preterm birth only adds weight to the recommendations to screen for and prevent HPV infection.”

HPV 16 and 18 are high-risk types that cause about 70% of cervical cancers and precancerous cervical lesions, according to the World Health Organization. However, there are three HPV vaccines – 9-valent HPV vaccine (Gardasil), quadrivalent HPV vaccine (Gardasil®, 4vHPV), and bivalent HPV vaccine (Cervarix) – that help protect against HPV 16/18.

The findings strengthen the benefits of HPV vaccination, Dr. Trottier explained. “There is no cure when the HPV infection is present,” Dr. Trottier said. “If the link [between preterm birth and HPV infections] is indeed causal, we can expect a greater risk of preterm delivery in these women. The effective tool we have is the HPV vaccination, but it should ideally be received before the start of sexual activity in order to prevent future infections that could occur in women.”

The American College of Obstetricians and Gynecologists recommends HPV vaccination for girls and women between the ages of 11 and 26 years old. However, Dr. Tanner said, women aged 27-45 who were previously unvaccinated may still receive benefit from the vaccine. 

“Despite the known efficacy of the vaccine, only 50% of patients are up to date with their HPV vaccination,” Dr. Tanner explained. “This study further highlights the need to educate and encourage patients to be vaccinated.”

The researchers said future studies should investigate the association of HPV vaccination and vaccination programs with the risk of preterm birth.

The experts disclosed no conflicts of interest.

Persistent human papillomavirus (HPV) 16 and HPV 18 during a pregnancy may be associated with an increased risk of premature birth.

Findings published online in JAMA Network Open found that 15.9% of individuals who had a persistent HPV 16 or 18 infection during the first and third trimesters of their pregnancy gave birth prematurely, compared with 5.6% of those who did not have an HPV infection at all.

The findings prompted the question of “the pathophysiology of HPV in pregnancy and how the virus is affecting the placenta,” said Lisette Davidson Tanner, MD, MPH, FACOG, who was not involved in the study.

Researchers said the findings are the first to show the association between preterm birth and HPV, which is an incurable virus that most sexually active individuals will get at some point in their lives, according to the Centers for Disease Control and Prevention.

“The results of this study are very important in helping us understand the burden caused by HPV in pregnancy,” study author Helen Trottier, MSc, PhD, researcher at the Centre Hospitalier Universitaire Sainte-Justine, said in an interview. “We may have just pinpointed an important cause of preterm birth that has so far been unexplained.”

Dr. Trottier and colleagues examined data from 1,052 pregnant women from three university-affiliated health care centers in Montreal between Nov. 8, 2010, and Oct. 16, 2016.

Only 5.6% of those who did not have an HPV infection had a premature birth, compared with 6.9% of those who tested positive for any HPV infection in the first trimester.

When looking at the first trimester, researchers found 12% of those diagnosed with HPV 16 and 18 had a preterm birth, compared to 4.9% of those who had a high-risk HPV infection other than HPV 16/18. When looking at the third trimester, researchers found that 15.9% of those with HPV 16/18 had an increased risk of giving birth prematurely, compared to those who had other high-risk HPV infections.

When researchers looked at the persistence of these HPV infections, they found that most HPV infections detected in the first trimester persist to the third trimester. The findings also revealed that persistent vaginal HPV 16/18 detection was significantly associated with all preterm births and spontaneous preterm births. This association was also found among those who had HPV infections detected in their placentas.

Meanwhile, 5.8% of those who had an HPV infection only during the first trimester experienced a preterm birth.

The researchers also found that HPV infections were frequent in pregnancy even among populations “considered to be at low risk based on sociodemographic and sexual history characteristics,” they wrote. Dr. Trottier said she hopes the findings will strengthen support for HPV vaccination.

Dr. Trottier’s study adds to a growing body of research regarding the adverse effects of HPV, according to Dr. Tanner, assistant professor of gynecology and obstetrics at Emory University, Atlanta. “It is already well known that HPV is associated with a number of anogenital and oropharyngeal cancers,” Dr. Tanner said in an interview. “The potential association with preterm birth only adds weight to the recommendations to screen for and prevent HPV infection.”

HPV 16 and 18 are high-risk types that cause about 70% of cervical cancers and precancerous cervical lesions, according to the World Health Organization. However, there are three HPV vaccines – 9-valent HPV vaccine (Gardasil), quadrivalent HPV vaccine (Gardasil®, 4vHPV), and bivalent HPV vaccine (Cervarix) – that help protect against HPV 16/18.

The findings strengthen the benefits of HPV vaccination, Dr. Trottier explained. “There is no cure when the HPV infection is present,” Dr. Trottier said. “If the link [between preterm birth and HPV infections] is indeed causal, we can expect a greater risk of preterm delivery in these women. The effective tool we have is the HPV vaccination, but it should ideally be received before the start of sexual activity in order to prevent future infections that could occur in women.”

The American College of Obstetricians and Gynecologists recommends HPV vaccination for girls and women between the ages of 11 and 26 years old. However, Dr. Tanner said, women aged 27-45 who were previously unvaccinated may still receive benefit from the vaccine. 

“Despite the known efficacy of the vaccine, only 50% of patients are up to date with their HPV vaccination,” Dr. Tanner explained. “This study further highlights the need to educate and encourage patients to be vaccinated.”

The researchers said future studies should investigate the association of HPV vaccination and vaccination programs with the risk of preterm birth.

The experts disclosed no conflicts of interest.

Persistent human papillomavirus (HPV) 16 and HPV 18 during a pregnancy may be associated with an increased risk of premature birth.

Findings published online in JAMA Network Open found that 15.9% of individuals who had a persistent HPV 16 or 18 infection during the first and third trimesters of their pregnancy gave birth prematurely, compared with 5.6% of those who did not have an HPV infection at all.

The findings prompted the question of “the pathophysiology of HPV in pregnancy and how the virus is affecting the placenta,” said Lisette Davidson Tanner, MD, MPH, FACOG, who was not involved in the study.

Researchers said the findings are the first to show the association between preterm birth and HPV, which is an incurable virus that most sexually active individuals will get at some point in their lives, according to the Centers for Disease Control and Prevention.

“The results of this study are very important in helping us understand the burden caused by HPV in pregnancy,” study author Helen Trottier, MSc, PhD, researcher at the Centre Hospitalier Universitaire Sainte-Justine, said in an interview. “We may have just pinpointed an important cause of preterm birth that has so far been unexplained.”

Dr. Trottier and colleagues examined data from 1,052 pregnant women from three university-affiliated health care centers in Montreal between Nov. 8, 2010, and Oct. 16, 2016.

Only 5.6% of those who did not have an HPV infection had a premature birth, compared with 6.9% of those who tested positive for any HPV infection in the first trimester.

When looking at the first trimester, researchers found 12% of those diagnosed with HPV 16 and 18 had a preterm birth, compared to 4.9% of those who had a high-risk HPV infection other than HPV 16/18. When looking at the third trimester, researchers found that 15.9% of those with HPV 16/18 had an increased risk of giving birth prematurely, compared to those who had other high-risk HPV infections.

When researchers looked at the persistence of these HPV infections, they found that most HPV infections detected in the first trimester persist to the third trimester. The findings also revealed that persistent vaginal HPV 16/18 detection was significantly associated with all preterm births and spontaneous preterm births. This association was also found among those who had HPV infections detected in their placentas.

Meanwhile, 5.8% of those who had an HPV infection only during the first trimester experienced a preterm birth.

The researchers also found that HPV infections were frequent in pregnancy even among populations “considered to be at low risk based on sociodemographic and sexual history characteristics,” they wrote. Dr. Trottier said she hopes the findings will strengthen support for HPV vaccination.

Dr. Trottier’s study adds to a growing body of research regarding the adverse effects of HPV, according to Dr. Tanner, assistant professor of gynecology and obstetrics at Emory University, Atlanta. “It is already well known that HPV is associated with a number of anogenital and oropharyngeal cancers,” Dr. Tanner said in an interview. “The potential association with preterm birth only adds weight to the recommendations to screen for and prevent HPV infection.”

HPV 16 and 18 are high-risk types that cause about 70% of cervical cancers and precancerous cervical lesions, according to the World Health Organization. However, there are three HPV vaccines – 9-valent HPV vaccine (Gardasil), quadrivalent HPV vaccine (Gardasil®, 4vHPV), and bivalent HPV vaccine (Cervarix) – that help protect against HPV 16/18.

The findings strengthen the benefits of HPV vaccination, Dr. Trottier explained. “There is no cure when the HPV infection is present,” Dr. Trottier said. “If the link [between preterm birth and HPV infections] is indeed causal, we can expect a greater risk of preterm delivery in these women. The effective tool we have is the HPV vaccination, but it should ideally be received before the start of sexual activity in order to prevent future infections that could occur in women.”

The American College of Obstetricians and Gynecologists recommends HPV vaccination for girls and women between the ages of 11 and 26 years old. However, Dr. Tanner said, women aged 27-45 who were previously unvaccinated may still receive benefit from the vaccine. 

“Despite the known efficacy of the vaccine, only 50% of patients are up to date with their HPV vaccination,” Dr. Tanner explained. “This study further highlights the need to educate and encourage patients to be vaccinated.”

The researchers said future studies should investigate the association of HPV vaccination and vaccination programs with the risk of preterm birth.

The experts disclosed no conflicts of interest.

Moderna has released new data that it said support the argument for COVID-19 booster shots – specifically showing that people who received a first shot of their mRNA vaccine a median of 13 months ago are more likely to experience a breakthrough infection compared to individuals who received a first shot a median of 8 months ago.

Geber86/Getty Images

The findings come from the ongoing phase 3 COVE clinical trial, the results of which the Food and Drug Administration considered in granting emergency use authorization for the vaccine. In the initial stage of the trial, people were randomly assigned to receive the company’s mRNA vaccine or placebo.

Participants in COVE who were immunized more recently were 36% less likely to experience a breakthrough infection, according to the analysis of the open-label extension of the study during which placebo participants could cross over and get immunized as well.  

The updated COVE trial data show that 88 breakthrough cases of COVID-19 occurred among 11,431 participants vaccinated between December 2020 and March 2021 (49.0 cases per 1,000 person-years).

In contrast, there were 162 breakthrough cases among 14,746 people vaccinated between July and October 2020 (77.1 cases per 1,000 person-years).

The breakthrough infections include 19 severe cases. Although not statically different, there was a trend toward fewer severe cases among the more recently vaccinated, at a rate of 3.3 per 1,000 person-years, compared with 6.2 per 1,000 person-years in the group vaccinated in 2020

The findings were posted as a preprint to the medRxiv server and have not yet been peer reviewed.

“The increased risk of breakthrough infections in COVE study participants who were vaccinated last year compared to more recently illustrates the impact of waning immunity and supports the need for a booster to maintain high levels of protection,” Moderna CEO Stéphane Bancel said in a company statement.

An FDA advisory committee is meeting Sept. 17 to look at the available evidence on boosters to help the agency decide whether the additional shots are warranted.

There is still a lot of debate in the medical community about the need for boosters. U.S. physicians and nurses are divided about the need for them and about how the country should prioritize its vaccine supplies, according to a Medscape poll of more than 1,700 clinicians that collected responses from Aug. 25 to Sept. 6, 2020.

The research was funded by Moderna, and also supported by the Office of the Assistant Secretary for Preparedness and Response, Biomedical Advanced Research and Development Authority, and by the National Institute of Allergy and Infectious Diseases.

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

Moderna has released new data that it said support the argument for COVID-19 booster shots – specifically showing that people who received a first shot of their mRNA vaccine a median of 13 months ago are more likely to experience a breakthrough infection compared to individuals who received a first shot a median of 8 months ago.

Geber86/Getty Images

The findings come from the ongoing phase 3 COVE clinical trial, the results of which the Food and Drug Administration considered in granting emergency use authorization for the vaccine. In the initial stage of the trial, people were randomly assigned to receive the company’s mRNA vaccine or placebo.

Participants in COVE who were immunized more recently were 36% less likely to experience a breakthrough infection, according to the analysis of the open-label extension of the study during which placebo participants could cross over and get immunized as well.  

The updated COVE trial data show that 88 breakthrough cases of COVID-19 occurred among 11,431 participants vaccinated between December 2020 and March 2021 (49.0 cases per 1,000 person-years).

In contrast, there were 162 breakthrough cases among 14,746 people vaccinated between July and October 2020 (77.1 cases per 1,000 person-years).

The breakthrough infections include 19 severe cases. Although not statically different, there was a trend toward fewer severe cases among the more recently vaccinated, at a rate of 3.3 per 1,000 person-years, compared with 6.2 per 1,000 person-years in the group vaccinated in 2020

The findings were posted as a preprint to the medRxiv server and have not yet been peer reviewed.

“The increased risk of breakthrough infections in COVE study participants who were vaccinated last year compared to more recently illustrates the impact of waning immunity and supports the need for a booster to maintain high levels of protection,” Moderna CEO Stéphane Bancel said in a company statement.

An FDA advisory committee is meeting Sept. 17 to look at the available evidence on boosters to help the agency decide whether the additional shots are warranted.

There is still a lot of debate in the medical community about the need for boosters. U.S. physicians and nurses are divided about the need for them and about how the country should prioritize its vaccine supplies, according to a Medscape poll of more than 1,700 clinicians that collected responses from Aug. 25 to Sept. 6, 2020.

The research was funded by Moderna, and also supported by the Office of the Assistant Secretary for Preparedness and Response, Biomedical Advanced Research and Development Authority, and by the National Institute of Allergy and Infectious Diseases.

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

Moderna has released new data that it said support the argument for COVID-19 booster shots – specifically showing that people who received a first shot of their mRNA vaccine a median of 13 months ago are more likely to experience a breakthrough infection compared to individuals who received a first shot a median of 8 months ago.

Geber86/Getty Images

The findings come from the ongoing phase 3 COVE clinical trial, the results of which the Food and Drug Administration considered in granting emergency use authorization for the vaccine. In the initial stage of the trial, people were randomly assigned to receive the company’s mRNA vaccine or placebo.

Participants in COVE who were immunized more recently were 36% less likely to experience a breakthrough infection, according to the analysis of the open-label extension of the study during which placebo participants could cross over and get immunized as well.  

The updated COVE trial data show that 88 breakthrough cases of COVID-19 occurred among 11,431 participants vaccinated between December 2020 and March 2021 (49.0 cases per 1,000 person-years).

In contrast, there were 162 breakthrough cases among 14,746 people vaccinated between July and October 2020 (77.1 cases per 1,000 person-years).

The breakthrough infections include 19 severe cases. Although not statically different, there was a trend toward fewer severe cases among the more recently vaccinated, at a rate of 3.3 per 1,000 person-years, compared with 6.2 per 1,000 person-years in the group vaccinated in 2020

The findings were posted as a preprint to the medRxiv server and have not yet been peer reviewed.

“The increased risk of breakthrough infections in COVE study participants who were vaccinated last year compared to more recently illustrates the impact of waning immunity and supports the need for a booster to maintain high levels of protection,” Moderna CEO Stéphane Bancel said in a company statement.

An FDA advisory committee is meeting Sept. 17 to look at the available evidence on boosters to help the agency decide whether the additional shots are warranted.

There is still a lot of debate in the medical community about the need for boosters. U.S. physicians and nurses are divided about the need for them and about how the country should prioritize its vaccine supplies, according to a Medscape poll of more than 1,700 clinicians that collected responses from Aug. 25 to Sept. 6, 2020.

The research was funded by Moderna, and also supported by the Office of the Assistant Secretary for Preparedness and Response, Biomedical Advanced Research and Development Authority, and by the National Institute of Allergy and Infectious Diseases.

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

A preprint study finding that the Pfizer-BioNTech mRNA COVID vaccine is associated with an increased risk for cardiac adverse events in teenage boys has elicited a firestorm on Twitter. Although some people issued thoughtful critiques, others lobbed insults against the authors, and still others accused them of either being antivaccine or stoking the fires of the vaccine skeptic movement.

The controversy began soon after the study was posted online September 8 on medRxiv. The authors conclude that for boys, the risk for a cardiac adverse event or hospitalization after the second dose of the Pfizer mRNA vaccine was “considerably higher” than the 120-day risk for hospitalization for COVID-19, “even at times of peak disease prevalence.” This was especially true for those aged 12 to 15 years and even those with no underlying health conditions.

The conclusion – as well as the paper’s source, the Vaccine Adverse Event Reporting System (VAERS), and its methodology, modeled after the Centers for Disease Control and Prevention assessment of the database – did not sit well with many.

“Your methodology hugely overestimates risk, which many commentators who are specialists in the field have highlighted,” tweeted Deepti Gurdasani, senior lecturer in epidemiology at Queen Mary University of London. “Why make this claim when you must know it’s wrong?”

“The authors don’t know what they are doing and they are following their own ideology,” tweeted Boback Ziaeian, MD, PhD, assistant professor of medicine at the University of California, Los Angeles, in the cardiology division. Dr. Ziaeian also tweeted, “I believe the CDC is doing honest work and not dredging slop like you are.”

“Holy shit. Truly terrible methods in that paper,” tweeted Michael Mina, MD, PhD, an epidemiologist and immunologist at the Harvard School of Public Health, Boston, more bluntly.

Some pointed out that VAERS is often used by vaccine skeptics to spread misinformation. “‘Dumpster diving’ describes studies using #VAERS by authors (almost always antivaxxers) who don’t understand its limitations,” tweeted David Gorski, MD, PhD, the editor of Science-Based Medicine, who says in his Twitter bio that he “exposes quackery.”

Added Dr. Gorski: “Doctors fell into this trap with their study suggesting #CovidVaccine is more dangerous to children than #COVID19.”

Dr. Gorski said he did not think that the authors were antivaccine. But, he tweeted, “I’d argue that at least one of the authors (Stevenson) is grossly unqualified to analyze the data. Mandrola? Marginal. The other two *might* be qualified in public health/epi, but they clearly either had no clue about #VAERS limitations or didn’t take them seriously enough.” 

Two of the authors, John Mandrola, MD, a cardiac electrophysiologist who is also a columnist for Medscape, and Tracy Beth Hoeg, MD, PhD, an epidemiologist and sports medicine specialist, told this news organization that their estimates are not definitive, owing to the nature of the VAERS database.

“I want to emphasize that our signal is hypothesis-generating,” said Dr. Mandrola. “There’s obviously more research that needs to be done.” 

“I don’t think it should be used to establish a for-certain rate,” said Dr. Hoeg, about the study. “It’s not a perfect way of establishing what the rate of cardiac adverse events was, but it gives you an estimate, and generally with VAERS, it’s a significant underestimate.”

Both Dr. Hoeg and Dr. Mandrola said their analysis showed enough of a signal that it warranted a rush to publish. “We felt that it was super time-sensitive,” Dr. Mandrola said.
 

Vaccine risks versus COVID harm

The authors searched the VAERS system for children aged 12 to 17 years who had received one or two doses of an mRNA vaccine and had symptoms of myocarditis, pericarditis, myopericarditis, or chest pain, and also troponin levels available in the lab data.

Of the 257 patients they examined, 211 had peak troponin values available for analysis. All but one received the Pfizer vaccine. Results were stratified by age and sex.

The authors found that the rates of cardiac adverse events (CAEs) after dose 1 were 12.0 per million for 12- to 15-year-old boys and 8.2 per million for 16- and 17-year-old boys, compared with 0.0 per million and 2.0 per million for girls the same ages.

The estimates for the 12- to 15-year-old boys were 22% to 150% higher than what the CDC had previously reported.

After the second dose, the rate of CAEs for boys 12 to 15 years was 162.2 per million (143% to 280% higher than the CDC estimate) and for boys 16 and 17 years, it was 94.0 per million, or 30% to 40% higher than CDC estimate.

Dr. Mandrola said he and his colleagues found potentially more cases by using slightly broader search terms than those employed by the CDC but agreed with some critics that a limitation was that they did not call the reporting physicians, as is typical with CDC follow-up on VAERS reports.

The authors point to troponin levels as valid indicators of myocardial damage. Peak troponin levels exceeded 2 ng/mL in 71% of the 12- to 15-year-olds and 82% of 16- and 17-year-olds.

The study shows that for boys 12 to 15 years with no comorbidities, the risk for a CAE after the second dose would be 22.8 times higher than the risk for hospitalization for COVID-19 during periods of low disease burden, 6.0 times higher during periods of moderate transmission, and 4.3 times higher during periods of high transmission.

The authors acknowledge in the paper that their analysis “does not take into account any benefits the vaccine provides against transmission to others, long-term COVID-19 disease risk, or protection from nonsevere COVID-19 symptoms.”

Both Dr. Mandrola and Dr. Hoeg told this news organization that they are currently recalculating their estimates because of the rising numbers of pediatric hospitalizations from the Delta variant surge.
 

Paper rejected by journals

Dr. Hoeg said in an interview that the paper went through peer-review at three journals but was rejected by all three, for reasons that were not made clear.

She and the other authors incorporated the reviewers’ feedback at each turn and included all of their suggestions in the paper that was ultimately uploaded to medRxiv, said Dr. Hoeg.

They decided to put it out as a preprint after the U.S. Food and Drug Administration issued its data and then a warning on June 25 about myocarditis with use of the Pfizer vaccine in children 12 to 15 years of age.

The preprint study was picked up by some media outlets, including The Telegraph and The Guardian newspapers, and tweeted out by vaccine skeptics like Robert W. Malone, MD. 

Rep. Marjorie Taylor Greene (R-Georgia), an outspoken vaccine skeptic, tweeted out the Guardian story saying that the findings mean “there is every reason to stop the covid vaccine mandates.”

Dr. Gorski noted in tweets and in a blog post that one of the paper’s coauthors, Josh Stevenson, is part of Rational Ground, a group that supports the Great Barrington Declaration and is against lockdowns and mask mandates.

Mr. Stevenson did not disclose his affiliation in the paper, and Dr. Hoeg said in an interview that she was unaware of the group and Mr. Stevenson’s association with it and that she did not have the impression that he was altering the data to show any bias.

Both Dr. Mandrola and Dr. Hoeg said they are provaccine and that they were dismayed to find their work being used to support any agenda. “It’s very frustrating,” said Dr. Hoeg, adding that she understands that “when you publish research on a controversial topic, people are going to take it and use it for their agendas.”

Some on Twitter blamed the open and free-wheeling nature of preprints.

Harlan Krumholz, MD, SM, the Harold H. Hines, junior professor of medicine and public health at Yale University, New Haven, Conn., which oversees medRxiv, tweeted, “Do you get that the discussion about the preprint is exactly the purpose of #preprints. So that way when someone claims something, you can look at the source and experts can comment.”

But Dr. Ziaeian tweeted back, “Preprints like this one can be weaponized to stir anti-vaccine lies and damage public health.”

In turn, the Yale physician replied, “Unfortunately these days, almost anything can be weaponized, distorted, misunderstood.” Dr. Krumholz added: “There is no question that this preprint is worthy of deep vetting and discussion. But there is a #preprint artifact to examine.”
 

Measured support

Some clinicians signaled their support for open debate and the preprint’s findings.

“I’ve been very critical of preprints that are too quickly disseminated in the media, and this one is no exception,” tweeted Walid Gellad, MD, MPH, associate professor of medicine at the University of Pittsburgh. “On the other hand, I think the vitriol directed at these authors is wrong,” he added.

“Like it or not, the issue of myocarditis in kids is an issue. Other countries have made vaccination decisions because of this issue, not because they’re driven by some ideology,” he tweeted.

Dr. Gellad also notes that the FDA has estimated the risk could be as high as one in 5,000 and that the preprint numbers could actually be underestimates.

In a long thread, Frank Han, MD, an adult congenital and pediatric cardiologist at the University of Illinois, tweets that relying on the VAERS reports might be faulty and that advanced cardiac imaging – guided by strict criteria – is the best way to determine myocarditis. And, he tweeted, “Physician review of VAERS reports really matters.”

Dr. Han concluded that vaccination “trades in a significant risk with a much smaller risk. That’s what counts in the end.”

In a response, Dr. Mandrola called Han’s tweets “reasoned criticism of our analysis.” He adds that his and Dr. Hoeg’s study have limits, but “our point is not to avoid protecting kids, but how to do so most safely.”

Both Dr. Mandrola and Dr. Hoeg said they welcomed critiques, but they felt blindsided by the vehemence of some of the Twitter debate.

“Some of the vitriol was surprising,” Dr. Mandrola said. “I kind of have this naive notion that people would assume that we’re not bad people,” he added.

However, Dr. Mandrola is known on Twitter for sometimes being highly critical of other researchers’ work, referring to some studies as “howlers,” and has in the past called out others for citing those papers.

Dr. Hoeg said she found critiques about weaknesses in the methods to be helpful. But she said many tweets were “attacking us as people, or not really attacking anything about our study, but just attacking the finding,” which does not help anyone “figure out what we should do about the safety signal or how we can research it further.”

Said Dr. Mandrola: “Why would we just ignore that and go forward with two-shot vaccination as a mandate when other countries are looking at other strategies?”

He noted that the United Kingdom has announced that children 12 to 15 years of age should receive just one shot of the mRNA vaccines instead of two because of the risk for myocarditis. Sixteen- to 18-year-olds have already been advised to get only one dose.

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

A preprint study finding that the Pfizer-BioNTech mRNA COVID vaccine is associated with an increased risk for cardiac adverse events in teenage boys has elicited a firestorm on Twitter. Although some people issued thoughtful critiques, others lobbed insults against the authors, and still others accused them of either being antivaccine or stoking the fires of the vaccine skeptic movement.

The controversy began soon after the study was posted online September 8 on medRxiv. The authors conclude that for boys, the risk for a cardiac adverse event or hospitalization after the second dose of the Pfizer mRNA vaccine was “considerably higher” than the 120-day risk for hospitalization for COVID-19, “even at times of peak disease prevalence.” This was especially true for those aged 12 to 15 years and even those with no underlying health conditions.

The conclusion – as well as the paper’s source, the Vaccine Adverse Event Reporting System (VAERS), and its methodology, modeled after the Centers for Disease Control and Prevention assessment of the database – did not sit well with many.

“Your methodology hugely overestimates risk, which many commentators who are specialists in the field have highlighted,” tweeted Deepti Gurdasani, senior lecturer in epidemiology at Queen Mary University of London. “Why make this claim when you must know it’s wrong?”

“The authors don’t know what they are doing and they are following their own ideology,” tweeted Boback Ziaeian, MD, PhD, assistant professor of medicine at the University of California, Los Angeles, in the cardiology division. Dr. Ziaeian also tweeted, “I believe the CDC is doing honest work and not dredging slop like you are.”

“Holy shit. Truly terrible methods in that paper,” tweeted Michael Mina, MD, PhD, an epidemiologist and immunologist at the Harvard School of Public Health, Boston, more bluntly.

Some pointed out that VAERS is often used by vaccine skeptics to spread misinformation. “‘Dumpster diving’ describes studies using #VAERS by authors (almost always antivaxxers) who don’t understand its limitations,” tweeted David Gorski, MD, PhD, the editor of Science-Based Medicine, who says in his Twitter bio that he “exposes quackery.”

Added Dr. Gorski: “Doctors fell into this trap with their study suggesting #CovidVaccine is more dangerous to children than #COVID19.”

Dr. Gorski said he did not think that the authors were antivaccine. But, he tweeted, “I’d argue that at least one of the authors (Stevenson) is grossly unqualified to analyze the data. Mandrola? Marginal. The other two *might* be qualified in public health/epi, but they clearly either had no clue about #VAERS limitations or didn’t take them seriously enough.” 

Two of the authors, John Mandrola, MD, a cardiac electrophysiologist who is also a columnist for Medscape, and Tracy Beth Hoeg, MD, PhD, an epidemiologist and sports medicine specialist, told this news organization that their estimates are not definitive, owing to the nature of the VAERS database.

“I want to emphasize that our signal is hypothesis-generating,” said Dr. Mandrola. “There’s obviously more research that needs to be done.” 

“I don’t think it should be used to establish a for-certain rate,” said Dr. Hoeg, about the study. “It’s not a perfect way of establishing what the rate of cardiac adverse events was, but it gives you an estimate, and generally with VAERS, it’s a significant underestimate.”

Both Dr. Hoeg and Dr. Mandrola said their analysis showed enough of a signal that it warranted a rush to publish. “We felt that it was super time-sensitive,” Dr. Mandrola said.
 

Vaccine risks versus COVID harm

The authors searched the VAERS system for children aged 12 to 17 years who had received one or two doses of an mRNA vaccine and had symptoms of myocarditis, pericarditis, myopericarditis, or chest pain, and also troponin levels available in the lab data.

Of the 257 patients they examined, 211 had peak troponin values available for analysis. All but one received the Pfizer vaccine. Results were stratified by age and sex.

The authors found that the rates of cardiac adverse events (CAEs) after dose 1 were 12.0 per million for 12- to 15-year-old boys and 8.2 per million for 16- and 17-year-old boys, compared with 0.0 per million and 2.0 per million for girls the same ages.

The estimates for the 12- to 15-year-old boys were 22% to 150% higher than what the CDC had previously reported.

After the second dose, the rate of CAEs for boys 12 to 15 years was 162.2 per million (143% to 280% higher than the CDC estimate) and for boys 16 and 17 years, it was 94.0 per million, or 30% to 40% higher than CDC estimate.

Dr. Mandrola said he and his colleagues found potentially more cases by using slightly broader search terms than those employed by the CDC but agreed with some critics that a limitation was that they did not call the reporting physicians, as is typical with CDC follow-up on VAERS reports.

The authors point to troponin levels as valid indicators of myocardial damage. Peak troponin levels exceeded 2 ng/mL in 71% of the 12- to 15-year-olds and 82% of 16- and 17-year-olds.

The study shows that for boys 12 to 15 years with no comorbidities, the risk for a CAE after the second dose would be 22.8 times higher than the risk for hospitalization for COVID-19 during periods of low disease burden, 6.0 times higher during periods of moderate transmission, and 4.3 times higher during periods of high transmission.

The authors acknowledge in the paper that their analysis “does not take into account any benefits the vaccine provides against transmission to others, long-term COVID-19 disease risk, or protection from nonsevere COVID-19 symptoms.”

Both Dr. Mandrola and Dr. Hoeg told this news organization that they are currently recalculating their estimates because of the rising numbers of pediatric hospitalizations from the Delta variant surge.
 

Paper rejected by journals

Dr. Hoeg said in an interview that the paper went through peer-review at three journals but was rejected by all three, for reasons that were not made clear.

She and the other authors incorporated the reviewers’ feedback at each turn and included all of their suggestions in the paper that was ultimately uploaded to medRxiv, said Dr. Hoeg.

They decided to put it out as a preprint after the U.S. Food and Drug Administration issued its data and then a warning on June 25 about myocarditis with use of the Pfizer vaccine in children 12 to 15 years of age.

The preprint study was picked up by some media outlets, including The Telegraph and The Guardian newspapers, and tweeted out by vaccine skeptics like Robert W. Malone, MD. 

Rep. Marjorie Taylor Greene (R-Georgia), an outspoken vaccine skeptic, tweeted out the Guardian story saying that the findings mean “there is every reason to stop the covid vaccine mandates.”

Dr. Gorski noted in tweets and in a blog post that one of the paper’s coauthors, Josh Stevenson, is part of Rational Ground, a group that supports the Great Barrington Declaration and is against lockdowns and mask mandates.

Mr. Stevenson did not disclose his affiliation in the paper, and Dr. Hoeg said in an interview that she was unaware of the group and Mr. Stevenson’s association with it and that she did not have the impression that he was altering the data to show any bias.

Both Dr. Mandrola and Dr. Hoeg said they are provaccine and that they were dismayed to find their work being used to support any agenda. “It’s very frustrating,” said Dr. Hoeg, adding that she understands that “when you publish research on a controversial topic, people are going to take it and use it for their agendas.”

Some on Twitter blamed the open and free-wheeling nature of preprints.

Harlan Krumholz, MD, SM, the Harold H. Hines, junior professor of medicine and public health at Yale University, New Haven, Conn., which oversees medRxiv, tweeted, “Do you get that the discussion about the preprint is exactly the purpose of #preprints. So that way when someone claims something, you can look at the source and experts can comment.”

But Dr. Ziaeian tweeted back, “Preprints like this one can be weaponized to stir anti-vaccine lies and damage public health.”

In turn, the Yale physician replied, “Unfortunately these days, almost anything can be weaponized, distorted, misunderstood.” Dr. Krumholz added: “There is no question that this preprint is worthy of deep vetting and discussion. But there is a #preprint artifact to examine.”
 

Measured support

Some clinicians signaled their support for open debate and the preprint’s findings.

“I’ve been very critical of preprints that are too quickly disseminated in the media, and this one is no exception,” tweeted Walid Gellad, MD, MPH, associate professor of medicine at the University of Pittsburgh. “On the other hand, I think the vitriol directed at these authors is wrong,” he added.

“Like it or not, the issue of myocarditis in kids is an issue. Other countries have made vaccination decisions because of this issue, not because they’re driven by some ideology,” he tweeted.

Dr. Gellad also notes that the FDA has estimated the risk could be as high as one in 5,000 and that the preprint numbers could actually be underestimates.

In a long thread, Frank Han, MD, an adult congenital and pediatric cardiologist at the University of Illinois, tweets that relying on the VAERS reports might be faulty and that advanced cardiac imaging – guided by strict criteria – is the best way to determine myocarditis. And, he tweeted, “Physician review of VAERS reports really matters.”

Dr. Han concluded that vaccination “trades in a significant risk with a much smaller risk. That’s what counts in the end.”

In a response, Dr. Mandrola called Han’s tweets “reasoned criticism of our analysis.” He adds that his and Dr. Hoeg’s study have limits, but “our point is not to avoid protecting kids, but how to do so most safely.”

Both Dr. Mandrola and Dr. Hoeg said they welcomed critiques, but they felt blindsided by the vehemence of some of the Twitter debate.

“Some of the vitriol was surprising,” Dr. Mandrola said. “I kind of have this naive notion that people would assume that we’re not bad people,” he added.

However, Dr. Mandrola is known on Twitter for sometimes being highly critical of other researchers’ work, referring to some studies as “howlers,” and has in the past called out others for citing those papers.

Dr. Hoeg said she found critiques about weaknesses in the methods to be helpful. But she said many tweets were “attacking us as people, or not really attacking anything about our study, but just attacking the finding,” which does not help anyone “figure out what we should do about the safety signal or how we can research it further.”

Said Dr. Mandrola: “Why would we just ignore that and go forward with two-shot vaccination as a mandate when other countries are looking at other strategies?”

He noted that the United Kingdom has announced that children 12 to 15 years of age should receive just one shot of the mRNA vaccines instead of two because of the risk for myocarditis. Sixteen- to 18-year-olds have already been advised to get only one dose.

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

A preprint study finding that the Pfizer-BioNTech mRNA COVID vaccine is associated with an increased risk for cardiac adverse events in teenage boys has elicited a firestorm on Twitter. Although some people issued thoughtful critiques, others lobbed insults against the authors, and still others accused them of either being antivaccine or stoking the fires of the vaccine skeptic movement.

The controversy began soon after the study was posted online September 8 on medRxiv. The authors conclude that for boys, the risk for a cardiac adverse event or hospitalization after the second dose of the Pfizer mRNA vaccine was “considerably higher” than the 120-day risk for hospitalization for COVID-19, “even at times of peak disease prevalence.” This was especially true for those aged 12 to 15 years and even those with no underlying health conditions.

The conclusion – as well as the paper’s source, the Vaccine Adverse Event Reporting System (VAERS), and its methodology, modeled after the Centers for Disease Control and Prevention assessment of the database – did not sit well with many.

“Your methodology hugely overestimates risk, which many commentators who are specialists in the field have highlighted,” tweeted Deepti Gurdasani, senior lecturer in epidemiology at Queen Mary University of London. “Why make this claim when you must know it’s wrong?”

“The authors don’t know what they are doing and they are following their own ideology,” tweeted Boback Ziaeian, MD, PhD, assistant professor of medicine at the University of California, Los Angeles, in the cardiology division. Dr. Ziaeian also tweeted, “I believe the CDC is doing honest work and not dredging slop like you are.”

“Holy shit. Truly terrible methods in that paper,” tweeted Michael Mina, MD, PhD, an epidemiologist and immunologist at the Harvard School of Public Health, Boston, more bluntly.

Some pointed out that VAERS is often used by vaccine skeptics to spread misinformation. “‘Dumpster diving’ describes studies using #VAERS by authors (almost always antivaxxers) who don’t understand its limitations,” tweeted David Gorski, MD, PhD, the editor of Science-Based Medicine, who says in his Twitter bio that he “exposes quackery.”

Added Dr. Gorski: “Doctors fell into this trap with their study suggesting #CovidVaccine is more dangerous to children than #COVID19.”

Dr. Gorski said he did not think that the authors were antivaccine. But, he tweeted, “I’d argue that at least one of the authors (Stevenson) is grossly unqualified to analyze the data. Mandrola? Marginal. The other two *might* be qualified in public health/epi, but they clearly either had no clue about #VAERS limitations or didn’t take them seriously enough.” 

Two of the authors, John Mandrola, MD, a cardiac electrophysiologist who is also a columnist for Medscape, and Tracy Beth Hoeg, MD, PhD, an epidemiologist and sports medicine specialist, told this news organization that their estimates are not definitive, owing to the nature of the VAERS database.

“I want to emphasize that our signal is hypothesis-generating,” said Dr. Mandrola. “There’s obviously more research that needs to be done.” 

“I don’t think it should be used to establish a for-certain rate,” said Dr. Hoeg, about the study. “It’s not a perfect way of establishing what the rate of cardiac adverse events was, but it gives you an estimate, and generally with VAERS, it’s a significant underestimate.”

Both Dr. Hoeg and Dr. Mandrola said their analysis showed enough of a signal that it warranted a rush to publish. “We felt that it was super time-sensitive,” Dr. Mandrola said.
 

Vaccine risks versus COVID harm

The authors searched the VAERS system for children aged 12 to 17 years who had received one or two doses of an mRNA vaccine and had symptoms of myocarditis, pericarditis, myopericarditis, or chest pain, and also troponin levels available in the lab data.

Of the 257 patients they examined, 211 had peak troponin values available for analysis. All but one received the Pfizer vaccine. Results were stratified by age and sex.

The authors found that the rates of cardiac adverse events (CAEs) after dose 1 were 12.0 per million for 12- to 15-year-old boys and 8.2 per million for 16- and 17-year-old boys, compared with 0.0 per million and 2.0 per million for girls the same ages.

The estimates for the 12- to 15-year-old boys were 22% to 150% higher than what the CDC had previously reported.

After the second dose, the rate of CAEs for boys 12 to 15 years was 162.2 per million (143% to 280% higher than the CDC estimate) and for boys 16 and 17 years, it was 94.0 per million, or 30% to 40% higher than CDC estimate.

Dr. Mandrola said he and his colleagues found potentially more cases by using slightly broader search terms than those employed by the CDC but agreed with some critics that a limitation was that they did not call the reporting physicians, as is typical with CDC follow-up on VAERS reports.

The authors point to troponin levels as valid indicators of myocardial damage. Peak troponin levels exceeded 2 ng/mL in 71% of the 12- to 15-year-olds and 82% of 16- and 17-year-olds.

The study shows that for boys 12 to 15 years with no comorbidities, the risk for a CAE after the second dose would be 22.8 times higher than the risk for hospitalization for COVID-19 during periods of low disease burden, 6.0 times higher during periods of moderate transmission, and 4.3 times higher during periods of high transmission.

The authors acknowledge in the paper that their analysis “does not take into account any benefits the vaccine provides against transmission to others, long-term COVID-19 disease risk, or protection from nonsevere COVID-19 symptoms.”

Both Dr. Mandrola and Dr. Hoeg told this news organization that they are currently recalculating their estimates because of the rising numbers of pediatric hospitalizations from the Delta variant surge.
 

Paper rejected by journals

Dr. Hoeg said in an interview that the paper went through peer-review at three journals but was rejected by all three, for reasons that were not made clear.

She and the other authors incorporated the reviewers’ feedback at each turn and included all of their suggestions in the paper that was ultimately uploaded to medRxiv, said Dr. Hoeg.

They decided to put it out as a preprint after the U.S. Food and Drug Administration issued its data and then a warning on June 25 about myocarditis with use of the Pfizer vaccine in children 12 to 15 years of age.

The preprint study was picked up by some media outlets, including The Telegraph and The Guardian newspapers, and tweeted out by vaccine skeptics like Robert W. Malone, MD. 

Rep. Marjorie Taylor Greene (R-Georgia), an outspoken vaccine skeptic, tweeted out the Guardian story saying that the findings mean “there is every reason to stop the covid vaccine mandates.”

Dr. Gorski noted in tweets and in a blog post that one of the paper’s coauthors, Josh Stevenson, is part of Rational Ground, a group that supports the Great Barrington Declaration and is against lockdowns and mask mandates.

Mr. Stevenson did not disclose his affiliation in the paper, and Dr. Hoeg said in an interview that she was unaware of the group and Mr. Stevenson’s association with it and that she did not have the impression that he was altering the data to show any bias.

Both Dr. Mandrola and Dr. Hoeg said they are provaccine and that they were dismayed to find their work being used to support any agenda. “It’s very frustrating,” said Dr. Hoeg, adding that she understands that “when you publish research on a controversial topic, people are going to take it and use it for their agendas.”

Some on Twitter blamed the open and free-wheeling nature of preprints.

Harlan Krumholz, MD, SM, the Harold H. Hines, junior professor of medicine and public health at Yale University, New Haven, Conn., which oversees medRxiv, tweeted, “Do you get that the discussion about the preprint is exactly the purpose of #preprints. So that way when someone claims something, you can look at the source and experts can comment.”

But Dr. Ziaeian tweeted back, “Preprints like this one can be weaponized to stir anti-vaccine lies and damage public health.”

In turn, the Yale physician replied, “Unfortunately these days, almost anything can be weaponized, distorted, misunderstood.” Dr. Krumholz added: “There is no question that this preprint is worthy of deep vetting and discussion. But there is a #preprint artifact to examine.”
 

Measured support

Some clinicians signaled their support for open debate and the preprint’s findings.

“I’ve been very critical of preprints that are too quickly disseminated in the media, and this one is no exception,” tweeted Walid Gellad, MD, MPH, associate professor of medicine at the University of Pittsburgh. “On the other hand, I think the vitriol directed at these authors is wrong,” he added.

“Like it or not, the issue of myocarditis in kids is an issue. Other countries have made vaccination decisions because of this issue, not because they’re driven by some ideology,” he tweeted.

Dr. Gellad also notes that the FDA has estimated the risk could be as high as one in 5,000 and that the preprint numbers could actually be underestimates.

In a long thread, Frank Han, MD, an adult congenital and pediatric cardiologist at the University of Illinois, tweets that relying on the VAERS reports might be faulty and that advanced cardiac imaging – guided by strict criteria – is the best way to determine myocarditis. And, he tweeted, “Physician review of VAERS reports really matters.”

Dr. Han concluded that vaccination “trades in a significant risk with a much smaller risk. That’s what counts in the end.”

In a response, Dr. Mandrola called Han’s tweets “reasoned criticism of our analysis.” He adds that his and Dr. Hoeg’s study have limits, but “our point is not to avoid protecting kids, but how to do so most safely.”

Both Dr. Mandrola and Dr. Hoeg said they welcomed critiques, but they felt blindsided by the vehemence of some of the Twitter debate.

“Some of the vitriol was surprising,” Dr. Mandrola said. “I kind of have this naive notion that people would assume that we’re not bad people,” he added.

However, Dr. Mandrola is known on Twitter for sometimes being highly critical of other researchers’ work, referring to some studies as “howlers,” and has in the past called out others for citing those papers.

Dr. Hoeg said she found critiques about weaknesses in the methods to be helpful. But she said many tweets were “attacking us as people, or not really attacking anything about our study, but just attacking the finding,” which does not help anyone “figure out what we should do about the safety signal or how we can research it further.”

Said Dr. Mandrola: “Why would we just ignore that and go forward with two-shot vaccination as a mandate when other countries are looking at other strategies?”

He noted that the United Kingdom has announced that children 12 to 15 years of age should receive just one shot of the mRNA vaccines instead of two because of the risk for myocarditis. Sixteen- to 18-year-olds have already been advised to get only one dose.

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

Pfizer’s COVID-19 vaccine could be authorized for ages 5-11 by the end of October, according to Reuters.

The timeline is based on the expectation that Pfizer will have enough data from clinical trials to request Food and Drug Administration emergency use authorization for the age group near the end of September. Then the FDA would likely make a decision about the vaccine’s safety and effectiveness in children within about 3 weeks, two sources told Reuters.

Anthony Fauci, MD, chief medical adviser to President Joe Biden and director of the National Institute of Allergy and Infectious Diseases, spoke about the timeline during an online town hall meeting Friday, Reuters reported. The meeting was attended by thousands of staff members at the National Institutes of Health.

If Pfizer submits paperwork to the FDA by the end of September, the vaccine could be available for kids around mid-October, Dr. Fauci said, and approval for the Moderna vaccine could come in November. Moderna will take about 3 weeks longer to collect and analyze data for ages 5-11.

Pfizer has said it would have enough data for ages 5-11 in September and would submit its documentation for FDA authorization soon after. Moderna told investors on Sept. 9 that data for ages 6-11 would be available by the end of the year.

On Sept. 10, the FDA said it would work to approve COVID-19 vaccines for children quickly once companies submit their data, according to Reuters. The agency said it would consider applications for emergency use, which would allow for faster approval.

Pfizer’s vaccine is the only one to receive full FDA approval, but only for people ages 16 and older. Adolescents ages 12-15 can receive the Pfizer vaccine under the FDA’s emergency use authorization.

For emergency use authorization, companies must submit 2 months of safety data versus 6 months for full approval. The FDA said on Sept. 10 that children in clinical trials should be monitored for at least 2 months to observe side effects.

BioNTech, Pfizer’s vaccine manufacturing partner, told a news outlet in Germany that it plans to request authorization globally for ages 5-11 in coming weeks, according to Reuters.

“Already over the next few weeks, we will file the results of our trial in 5- to 11-year-olds with regulators across the world and will request approval of the vaccine in this age group, also here in Europe,” Oezlem Tuereci, MD, the chief medical officer for BioNTech, told Der Spiegel.

The company is completing the final production steps to make the vaccine at lower doses for the younger age group, she said. Pfizer and BioNTech will also seek vaccine approval for ages 6 months to 2 years later this year.

“Things are looking good, everything is going according to plan,” Ugur Sahin, MD, the CEO of BioNTech, told Der Spiegel.

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

Pfizer’s COVID-19 vaccine could be authorized for ages 5-11 by the end of October, according to Reuters.

The timeline is based on the expectation that Pfizer will have enough data from clinical trials to request Food and Drug Administration emergency use authorization for the age group near the end of September. Then the FDA would likely make a decision about the vaccine’s safety and effectiveness in children within about 3 weeks, two sources told Reuters.

Anthony Fauci, MD, chief medical adviser to President Joe Biden and director of the National Institute of Allergy and Infectious Diseases, spoke about the timeline during an online town hall meeting Friday, Reuters reported. The meeting was attended by thousands of staff members at the National Institutes of Health.

If Pfizer submits paperwork to the FDA by the end of September, the vaccine could be available for kids around mid-October, Dr. Fauci said, and approval for the Moderna vaccine could come in November. Moderna will take about 3 weeks longer to collect and analyze data for ages 5-11.

Pfizer has said it would have enough data for ages 5-11 in September and would submit its documentation for FDA authorization soon after. Moderna told investors on Sept. 9 that data for ages 6-11 would be available by the end of the year.

On Sept. 10, the FDA said it would work to approve COVID-19 vaccines for children quickly once companies submit their data, according to Reuters. The agency said it would consider applications for emergency use, which would allow for faster approval.

Pfizer’s vaccine is the only one to receive full FDA approval, but only for people ages 16 and older. Adolescents ages 12-15 can receive the Pfizer vaccine under the FDA’s emergency use authorization.

For emergency use authorization, companies must submit 2 months of safety data versus 6 months for full approval. The FDA said on Sept. 10 that children in clinical trials should be monitored for at least 2 months to observe side effects.

BioNTech, Pfizer’s vaccine manufacturing partner, told a news outlet in Germany that it plans to request authorization globally for ages 5-11 in coming weeks, according to Reuters.

“Already over the next few weeks, we will file the results of our trial in 5- to 11-year-olds with regulators across the world and will request approval of the vaccine in this age group, also here in Europe,” Oezlem Tuereci, MD, the chief medical officer for BioNTech, told Der Spiegel.

The company is completing the final production steps to make the vaccine at lower doses for the younger age group, she said. Pfizer and BioNTech will also seek vaccine approval for ages 6 months to 2 years later this year.

“Things are looking good, everything is going according to plan,” Ugur Sahin, MD, the CEO of BioNTech, told Der Spiegel.

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

Pfizer’s COVID-19 vaccine could be authorized for ages 5-11 by the end of October, according to Reuters.

The timeline is based on the expectation that Pfizer will have enough data from clinical trials to request Food and Drug Administration emergency use authorization for the age group near the end of September. Then the FDA would likely make a decision about the vaccine’s safety and effectiveness in children within about 3 weeks, two sources told Reuters.

Anthony Fauci, MD, chief medical adviser to President Joe Biden and director of the National Institute of Allergy and Infectious Diseases, spoke about the timeline during an online town hall meeting Friday, Reuters reported. The meeting was attended by thousands of staff members at the National Institutes of Health.

If Pfizer submits paperwork to the FDA by the end of September, the vaccine could be available for kids around mid-October, Dr. Fauci said, and approval for the Moderna vaccine could come in November. Moderna will take about 3 weeks longer to collect and analyze data for ages 5-11.

Pfizer has said it would have enough data for ages 5-11 in September and would submit its documentation for FDA authorization soon after. Moderna told investors on Sept. 9 that data for ages 6-11 would be available by the end of the year.

On Sept. 10, the FDA said it would work to approve COVID-19 vaccines for children quickly once companies submit their data, according to Reuters. The agency said it would consider applications for emergency use, which would allow for faster approval.

Pfizer’s vaccine is the only one to receive full FDA approval, but only for people ages 16 and older. Adolescents ages 12-15 can receive the Pfizer vaccine under the FDA’s emergency use authorization.

For emergency use authorization, companies must submit 2 months of safety data versus 6 months for full approval. The FDA said on Sept. 10 that children in clinical trials should be monitored for at least 2 months to observe side effects.

BioNTech, Pfizer’s vaccine manufacturing partner, told a news outlet in Germany that it plans to request authorization globally for ages 5-11 in coming weeks, according to Reuters.

“Already over the next few weeks, we will file the results of our trial in 5- to 11-year-olds with regulators across the world and will request approval of the vaccine in this age group, also here in Europe,” Oezlem Tuereci, MD, the chief medical officer for BioNTech, told Der Spiegel.

The company is completing the final production steps to make the vaccine at lower doses for the younger age group, she said. Pfizer and BioNTech will also seek vaccine approval for ages 6 months to 2 years later this year.

“Things are looking good, everything is going according to plan,” Ugur Sahin, MD, the CEO of BioNTech, told Der Spiegel.

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

Although breakthrough COVID-19 infections appear to be infrequent in people with inflammatory rheumatic and musculoskeletal diseases (iRMDs), these patients’ comparatively low antibodies after their initial vaccine series validate the recommendation that booster doses could reinforce their immune responses. These findings were highlighted in three letters recently published in Annals of the Rheumatic Diseases.

In the first letter, the researchers assessed breakthrough COVID-19 infections among vaccinated patients with iRMDs who were treated within the Mass General Brigham health care system in the Boston area. Of the 340 COVID-19 infections in patients with iRMDs after vaccinations were approved by the Food and Drug Administration for emergency use, 16 (4.7%) were breakthrough infections. All but one of the breakthrough infections were symptomatic, and six of the patients were hospitalized.

Patients who had breakthrough infections took disease-modifying antirheumatic drugs (DMARDs) that included rituximab and glucocorticoids (five patients each), mycophenolate mofetil or mycophenolic acid (four patients), and methotrexate (three patients). Two of the patients died, both of whom were on rituximab and had interstitial lung disease.

“Some DMARD users may require alternative risk-mitigation strategies, including passive immunity or booster vaccines, and may need to continue shielding practices,” the authors wrote.

“Honestly, it’s hard to know what to make of that rate of breakthrough infections,” Camille Kotton, MD, clinical director of transplant and immunocompromised host infectious diseases in the infectious diseases division at Massachusetts General Hospital in Boston, said in an interview. “People who are immunocompromised were strongly advised to change behavior so as to avoid infection, which probably greatly alters their risk of breakthrough infection. It’s thus hard to evaluate vaccine efficacy.

“Also, 93% were symptomatic, which is fairly high,” she added. “I’m not sure if these patients were more likely to be symptomatic or if there was some bias in testing based on symptoms.”

In the second letter, the researchers assessed postvaccination COVID-19 infections in European patients with iRMDs. Two COVID-19 registries with thousands of patients were reviewed, with less than 1% of patients in each deemed eligible for this study. Of the 34 patients who were ultimately analyzed with available COVID-19 outcomes – 10 were fully vaccinated and 24 were partially vaccinated – 28 fully recovered, 3 recovered with ongoing sequelae, and 3 patients died. The three patients who died were all over 70 years old and had been treated with glucocorticoids and mycophenolate mofetil, glucocorticoids, and rituximab, respectively.

The medications most frequently used by the iRMDs patients with breakthrough cases included glucocorticoids (32%), methotrexate (26%), and tumor necrosis factor inhibitors (26%).

“Overall, the low numbers of SARS-CoV-2 infection post vaccination in both registries are encouraging,” the authors wrote, adding that “all three deceased patients were treated with medications that are potential negative influences on postvaccination SARS-CoV-2 immunogenicity in the RMD population.”
 

Patients with RMDs: Consider COVID-19 booster shots

In the third letter, the researchers investigated booster doses of COVID-19 vaccine in patients with autoimmune diseases. Of the 18 participants who received a booster dose, 14 were on antimetabolite therapy and 8 of those were on mycophenolate. At a median of 29 days after completion of their initial vaccine series, antispike antibodies were negative in 10 of the participants and low positive in 6 others, with a median antispike antibody level of less than 0.4 U/mL (interquartile range, <0.4-222 U/mL).

Booster doses were administered at a median of 77 days after completion of the initial series. At a median of 30 days after booster dose, 89% of the participants had an augmented humoral response, with a median antispike antibody level of 2,500 (IQR, 885-2,500 U/mL). Of the 10 participants who had negative anti-spike antibodies after the initial series, 80% were positive after the booster.

“I think this study supports the wealth of evidence that contributed to the [Centers for Disease Control and Prevention]’s and the FDA’s recommendation to get the third dose of the COVID vaccination,” coauthor Julie J. Paik, MD, of Johns Hopkins University, Baltimore, said in an interview. “Our patients are a very vulnerable group, including lupus patients or myositis patients, both of whom can get severe COVID if they were to contract it. They think they’re protected after a two-dose series, but in reality they’re not.

“We were just happy that they had a response,” she added. “Most of them had absolutely no response whatsoever after the first series.”

One other recently published case report in Arthritis & Rheumatology describes booster vaccination with the viral vector Johnson & Johnson vaccine in a man with seropositive RA who had previously received both doses of the Moderna mRNA-1273 vaccine. The 74-year-old man, who had low disease activity over the past 5 years on hydroxychloroquine, etanercept, and leflunomide, received the booster dose of his own accord after undergoing testing that showed a semiquantitative spike protein receptor binding domain (RBD) antibody level of 53.9 U/mL (reference range, 0-2,500 U/mL) and a negative SARS-CoV-2 antispike (S1/RBD) IgG test, as well as less than 10% blocking activity on an assay designed to detect blocking of the interaction between the SARS-CoV-2 spike protein RBD and the human ACE2 receptor and a negative interferon-gamma release assay detecting SARS-CoV-2–specific T cells. Several weeks after the booster dose, a repeat semiquantitative spike protein RBD antibody level was 2,455.0 U/mL and the S1/RBD IgG level was positive. An ACE2 blocking assay demonstrated 90%-100% blocking activity, but the interferon-gamma release assay remained negative.

“I would recommend abiding by the CDC guidelines regarding boosters for immunocompromised patients,” Dr. Kotton stated. “Patients with rheumatologic disease generally fit into the last category on that list. We don’t have an antibody titer that ensures protection, and as per CDC guidance, we don’t recommend checking antibody titers. Furthermore, boosters were given for this study before the CDC recommendation came out.”

Dr. Paik and coauthors acknowledged their study’s limitations, including a small, inhomogeneous sample and a lack of data on memory B-cell and T-cell response. They also echoed Dr. Kotton’s thoughts by noting that, although this subset of patients had notably limited antibody responses, “no antibody titer has been defined to correlate with protection.”

“Of course, the humoral response isn’t the whole story,” Dr. Paik said. “Some studies are showing that some vaccine recipients may not have the antibodies but their T-cell response may still be intact; it just takes time, and we’re not picking it up. Even if the antibody test is coming up negative, there may be some immunogenicity to the vaccine that we’re not detecting.

“Hopefully at some point, we’ll have more T-cell immunophenotyping to provide better insight into the full vaccine response.”

The Boston-area breakthrough study and the booster shot study were both funded primarily by grants from various institutes within the National Institutes of Health. The European study was financially supported by the European Alliance of Associations for Rheumatology.

Although breakthrough COVID-19 infections appear to be infrequent in people with inflammatory rheumatic and musculoskeletal diseases (iRMDs), these patients’ comparatively low antibodies after their initial vaccine series validate the recommendation that booster doses could reinforce their immune responses. These findings were highlighted in three letters recently published in Annals of the Rheumatic Diseases.

In the first letter, the researchers assessed breakthrough COVID-19 infections among vaccinated patients with iRMDs who were treated within the Mass General Brigham health care system in the Boston area. Of the 340 COVID-19 infections in patients with iRMDs after vaccinations were approved by the Food and Drug Administration for emergency use, 16 (4.7%) were breakthrough infections. All but one of the breakthrough infections were symptomatic, and six of the patients were hospitalized.

Patients who had breakthrough infections took disease-modifying antirheumatic drugs (DMARDs) that included rituximab and glucocorticoids (five patients each), mycophenolate mofetil or mycophenolic acid (four patients), and methotrexate (three patients). Two of the patients died, both of whom were on rituximab and had interstitial lung disease.

“Some DMARD users may require alternative risk-mitigation strategies, including passive immunity or booster vaccines, and may need to continue shielding practices,” the authors wrote.

“Honestly, it’s hard to know what to make of that rate of breakthrough infections,” Camille Kotton, MD, clinical director of transplant and immunocompromised host infectious diseases in the infectious diseases division at Massachusetts General Hospital in Boston, said in an interview. “People who are immunocompromised were strongly advised to change behavior so as to avoid infection, which probably greatly alters their risk of breakthrough infection. It’s thus hard to evaluate vaccine efficacy.

“Also, 93% were symptomatic, which is fairly high,” she added. “I’m not sure if these patients were more likely to be symptomatic or if there was some bias in testing based on symptoms.”

In the second letter, the researchers assessed postvaccination COVID-19 infections in European patients with iRMDs. Two COVID-19 registries with thousands of patients were reviewed, with less than 1% of patients in each deemed eligible for this study. Of the 34 patients who were ultimately analyzed with available COVID-19 outcomes – 10 were fully vaccinated and 24 were partially vaccinated – 28 fully recovered, 3 recovered with ongoing sequelae, and 3 patients died. The three patients who died were all over 70 years old and had been treated with glucocorticoids and mycophenolate mofetil, glucocorticoids, and rituximab, respectively.

The medications most frequently used by the iRMDs patients with breakthrough cases included glucocorticoids (32%), methotrexate (26%), and tumor necrosis factor inhibitors (26%).

“Overall, the low numbers of SARS-CoV-2 infection post vaccination in both registries are encouraging,” the authors wrote, adding that “all three deceased patients were treated with medications that are potential negative influences on postvaccination SARS-CoV-2 immunogenicity in the RMD population.”
 

Patients with RMDs: Consider COVID-19 booster shots

In the third letter, the researchers investigated booster doses of COVID-19 vaccine in patients with autoimmune diseases. Of the 18 participants who received a booster dose, 14 were on antimetabolite therapy and 8 of those were on mycophenolate. At a median of 29 days after completion of their initial vaccine series, antispike antibodies were negative in 10 of the participants and low positive in 6 others, with a median antispike antibody level of less than 0.4 U/mL (interquartile range, <0.4-222 U/mL).

Booster doses were administered at a median of 77 days after completion of the initial series. At a median of 30 days after booster dose, 89% of the participants had an augmented humoral response, with a median antispike antibody level of 2,500 (IQR, 885-2,500 U/mL). Of the 10 participants who had negative anti-spike antibodies after the initial series, 80% were positive after the booster.

“I think this study supports the wealth of evidence that contributed to the [Centers for Disease Control and Prevention]’s and the FDA’s recommendation to get the third dose of the COVID vaccination,” coauthor Julie J. Paik, MD, of Johns Hopkins University, Baltimore, said in an interview. “Our patients are a very vulnerable group, including lupus patients or myositis patients, both of whom can get severe COVID if they were to contract it. They think they’re protected after a two-dose series, but in reality they’re not.

“We were just happy that they had a response,” she added. “Most of them had absolutely no response whatsoever after the first series.”

One other recently published case report in Arthritis & Rheumatology describes booster vaccination with the viral vector Johnson & Johnson vaccine in a man with seropositive RA who had previously received both doses of the Moderna mRNA-1273 vaccine. The 74-year-old man, who had low disease activity over the past 5 years on hydroxychloroquine, etanercept, and leflunomide, received the booster dose of his own accord after undergoing testing that showed a semiquantitative spike protein receptor binding domain (RBD) antibody level of 53.9 U/mL (reference range, 0-2,500 U/mL) and a negative SARS-CoV-2 antispike (S1/RBD) IgG test, as well as less than 10% blocking activity on an assay designed to detect blocking of the interaction between the SARS-CoV-2 spike protein RBD and the human ACE2 receptor and a negative interferon-gamma release assay detecting SARS-CoV-2–specific T cells. Several weeks after the booster dose, a repeat semiquantitative spike protein RBD antibody level was 2,455.0 U/mL and the S1/RBD IgG level was positive. An ACE2 blocking assay demonstrated 90%-100% blocking activity, but the interferon-gamma release assay remained negative.

“I would recommend abiding by the CDC guidelines regarding boosters for immunocompromised patients,” Dr. Kotton stated. “Patients with rheumatologic disease generally fit into the last category on that list. We don’t have an antibody titer that ensures protection, and as per CDC guidance, we don’t recommend checking antibody titers. Furthermore, boosters were given for this study before the CDC recommendation came out.”

Dr. Paik and coauthors acknowledged their study’s limitations, including a small, inhomogeneous sample and a lack of data on memory B-cell and T-cell response. They also echoed Dr. Kotton’s thoughts by noting that, although this subset of patients had notably limited antibody responses, “no antibody titer has been defined to correlate with protection.”

“Of course, the humoral response isn’t the whole story,” Dr. Paik said. “Some studies are showing that some vaccine recipients may not have the antibodies but their T-cell response may still be intact; it just takes time, and we’re not picking it up. Even if the antibody test is coming up negative, there may be some immunogenicity to the vaccine that we’re not detecting.

“Hopefully at some point, we’ll have more T-cell immunophenotyping to provide better insight into the full vaccine response.”

The Boston-area breakthrough study and the booster shot study were both funded primarily by grants from various institutes within the National Institutes of Health. The European study was financially supported by the European Alliance of Associations for Rheumatology.

Although breakthrough COVID-19 infections appear to be infrequent in people with inflammatory rheumatic and musculoskeletal diseases (iRMDs), these patients’ comparatively low antibodies after their initial vaccine series validate the recommendation that booster doses could reinforce their immune responses. These findings were highlighted in three letters recently published in Annals of the Rheumatic Diseases.

In the first letter, the researchers assessed breakthrough COVID-19 infections among vaccinated patients with iRMDs who were treated within the Mass General Brigham health care system in the Boston area. Of the 340 COVID-19 infections in patients with iRMDs after vaccinations were approved by the Food and Drug Administration for emergency use, 16 (4.7%) were breakthrough infections. All but one of the breakthrough infections were symptomatic, and six of the patients were hospitalized.

Patients who had breakthrough infections took disease-modifying antirheumatic drugs (DMARDs) that included rituximab and glucocorticoids (five patients each), mycophenolate mofetil or mycophenolic acid (four patients), and methotrexate (three patients). Two of the patients died, both of whom were on rituximab and had interstitial lung disease.

“Some DMARD users may require alternative risk-mitigation strategies, including passive immunity or booster vaccines, and may need to continue shielding practices,” the authors wrote.

“Honestly, it’s hard to know what to make of that rate of breakthrough infections,” Camille Kotton, MD, clinical director of transplant and immunocompromised host infectious diseases in the infectious diseases division at Massachusetts General Hospital in Boston, said in an interview. “People who are immunocompromised were strongly advised to change behavior so as to avoid infection, which probably greatly alters their risk of breakthrough infection. It’s thus hard to evaluate vaccine efficacy.

“Also, 93% were symptomatic, which is fairly high,” she added. “I’m not sure if these patients were more likely to be symptomatic or if there was some bias in testing based on symptoms.”

In the second letter, the researchers assessed postvaccination COVID-19 infections in European patients with iRMDs. Two COVID-19 registries with thousands of patients were reviewed, with less than 1% of patients in each deemed eligible for this study. Of the 34 patients who were ultimately analyzed with available COVID-19 outcomes – 10 were fully vaccinated and 24 were partially vaccinated – 28 fully recovered, 3 recovered with ongoing sequelae, and 3 patients died. The three patients who died were all over 70 years old and had been treated with glucocorticoids and mycophenolate mofetil, glucocorticoids, and rituximab, respectively.

The medications most frequently used by the iRMDs patients with breakthrough cases included glucocorticoids (32%), methotrexate (26%), and tumor necrosis factor inhibitors (26%).

“Overall, the low numbers of SARS-CoV-2 infection post vaccination in both registries are encouraging,” the authors wrote, adding that “all three deceased patients were treated with medications that are potential negative influences on postvaccination SARS-CoV-2 immunogenicity in the RMD population.”
 

Patients with RMDs: Consider COVID-19 booster shots

In the third letter, the researchers investigated booster doses of COVID-19 vaccine in patients with autoimmune diseases. Of the 18 participants who received a booster dose, 14 were on antimetabolite therapy and 8 of those were on mycophenolate. At a median of 29 days after completion of their initial vaccine series, antispike antibodies were negative in 10 of the participants and low positive in 6 others, with a median antispike antibody level of less than 0.4 U/mL (interquartile range, <0.4-222 U/mL).

Booster doses were administered at a median of 77 days after completion of the initial series. At a median of 30 days after booster dose, 89% of the participants had an augmented humoral response, with a median antispike antibody level of 2,500 (IQR, 885-2,500 U/mL). Of the 10 participants who had negative anti-spike antibodies after the initial series, 80% were positive after the booster.

“I think this study supports the wealth of evidence that contributed to the [Centers for Disease Control and Prevention]’s and the FDA’s recommendation to get the third dose of the COVID vaccination,” coauthor Julie J. Paik, MD, of Johns Hopkins University, Baltimore, said in an interview. “Our patients are a very vulnerable group, including lupus patients or myositis patients, both of whom can get severe COVID if they were to contract it. They think they’re protected after a two-dose series, but in reality they’re not.

“We were just happy that they had a response,” she added. “Most of them had absolutely no response whatsoever after the first series.”

One other recently published case report in Arthritis & Rheumatology describes booster vaccination with the viral vector Johnson & Johnson vaccine in a man with seropositive RA who had previously received both doses of the Moderna mRNA-1273 vaccine. The 74-year-old man, who had low disease activity over the past 5 years on hydroxychloroquine, etanercept, and leflunomide, received the booster dose of his own accord after undergoing testing that showed a semiquantitative spike protein receptor binding domain (RBD) antibody level of 53.9 U/mL (reference range, 0-2,500 U/mL) and a negative SARS-CoV-2 antispike (S1/RBD) IgG test, as well as less than 10% blocking activity on an assay designed to detect blocking of the interaction between the SARS-CoV-2 spike protein RBD and the human ACE2 receptor and a negative interferon-gamma release assay detecting SARS-CoV-2–specific T cells. Several weeks after the booster dose, a repeat semiquantitative spike protein RBD antibody level was 2,455.0 U/mL and the S1/RBD IgG level was positive. An ACE2 blocking assay demonstrated 90%-100% blocking activity, but the interferon-gamma release assay remained negative.

“I would recommend abiding by the CDC guidelines regarding boosters for immunocompromised patients,” Dr. Kotton stated. “Patients with rheumatologic disease generally fit into the last category on that list. We don’t have an antibody titer that ensures protection, and as per CDC guidance, we don’t recommend checking antibody titers. Furthermore, boosters were given for this study before the CDC recommendation came out.”

Dr. Paik and coauthors acknowledged their study’s limitations, including a small, inhomogeneous sample and a lack of data on memory B-cell and T-cell response. They also echoed Dr. Kotton’s thoughts by noting that, although this subset of patients had notably limited antibody responses, “no antibody titer has been defined to correlate with protection.”

“Of course, the humoral response isn’t the whole story,” Dr. Paik said. “Some studies are showing that some vaccine recipients may not have the antibodies but their T-cell response may still be intact; it just takes time, and we’re not picking it up. Even if the antibody test is coming up negative, there may be some immunogenicity to the vaccine that we’re not detecting.

“Hopefully at some point, we’ll have more T-cell immunophenotyping to provide better insight into the full vaccine response.”

The Boston-area breakthrough study and the booster shot study were both funded primarily by grants from various institutes within the National Institutes of Health. The European study was financially supported by the European Alliance of Associations for Rheumatology.

Receiving a COVID-19 vaccine early in pregnancy is not associated with an increased risk for spontaneous abortion, new research suggests.

The study, published online in JAMA, evaluated the proportion of women who received the vaccine and had ongoing pregnancies in comparison with those who experienced a miscarriage or spontaneous abortion. The researchers analyzed data from 105,446 unique pregnancies over seven 4-week surveillance periods between December 2020 and June 2021. Ongoing pregnancies between 6 and 19 weeks’ gestation were identified on the last day of each 4-week surveillance period (index date). Spontaneous abortions were assigned to a 4-week surveillance period on the basis of their outcome date. There were 13,160 spontaneous abortions and 92,286 ongoing pregnancies.

Overall, a COVID-19 vaccine was received within 28 days prior to an index date among 8.0% of ongoing pregnancy surveillance periods versus 8.6% of spontaneous abortions.

“We’re hoping that this data can inform the ongoing conversations between providers and pregnant women [about the COVID-19 vaccines],” study author Elyse O. Kharbanda, MD, MPH, senior research investigator at HealthPartners Institute, told this news organization. “It should be considered in the context of all the data that’s coming out both on the risks of COVID infection and pregnancy and data on outcomes among women who are vaccinated and pregnant.”

Among the women whose pregnancies were followed, 7.8% received at least one dose of the Pfizer COVID-19 vaccine, 6% received at least one dose of the Moderna COVID-19 vaccine, and 0.5% received the Janssen vaccine.

In August, the American College of Obstetricians and Gynecologists (ACOG), the Centers for Disease Control and Prevention, and the Society for Maternal-Fetal Medicine strongly recommended that all pregnant women be vaccinated against COVID-19.

The new findings provide reassuring evidence about the safety of COVID vaccines, particularly mRNA vaccines, during pregnancy, said Denise J. Jamieson, MD, MPH, chair of the department of gynecology and obstetrics at Emory University, Atlanta, who was not involved in the study.

“The study design was a carefully conducted case-control study. Although ideally the best design for studying vaccine safety and efficacy is a randomized clinical trial, data are rapidly accumulating from a variety of sources that COVID vaccines are safe in pregnancy,” said Dr. Jamieson, who serves on several ACOG committees.

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

Receiving a COVID-19 vaccine early in pregnancy is not associated with an increased risk for spontaneous abortion, new research suggests.

The study, published online in JAMA, evaluated the proportion of women who received the vaccine and had ongoing pregnancies in comparison with those who experienced a miscarriage or spontaneous abortion. The researchers analyzed data from 105,446 unique pregnancies over seven 4-week surveillance periods between December 2020 and June 2021. Ongoing pregnancies between 6 and 19 weeks’ gestation were identified on the last day of each 4-week surveillance period (index date). Spontaneous abortions were assigned to a 4-week surveillance period on the basis of their outcome date. There were 13,160 spontaneous abortions and 92,286 ongoing pregnancies.

Overall, a COVID-19 vaccine was received within 28 days prior to an index date among 8.0% of ongoing pregnancy surveillance periods versus 8.6% of spontaneous abortions.

“We’re hoping that this data can inform the ongoing conversations between providers and pregnant women [about the COVID-19 vaccines],” study author Elyse O. Kharbanda, MD, MPH, senior research investigator at HealthPartners Institute, told this news organization. “It should be considered in the context of all the data that’s coming out both on the risks of COVID infection and pregnancy and data on outcomes among women who are vaccinated and pregnant.”

Among the women whose pregnancies were followed, 7.8% received at least one dose of the Pfizer COVID-19 vaccine, 6% received at least one dose of the Moderna COVID-19 vaccine, and 0.5% received the Janssen vaccine.

In August, the American College of Obstetricians and Gynecologists (ACOG), the Centers for Disease Control and Prevention, and the Society for Maternal-Fetal Medicine strongly recommended that all pregnant women be vaccinated against COVID-19.

The new findings provide reassuring evidence about the safety of COVID vaccines, particularly mRNA vaccines, during pregnancy, said Denise J. Jamieson, MD, MPH, chair of the department of gynecology and obstetrics at Emory University, Atlanta, who was not involved in the study.

“The study design was a carefully conducted case-control study. Although ideally the best design for studying vaccine safety and efficacy is a randomized clinical trial, data are rapidly accumulating from a variety of sources that COVID vaccines are safe in pregnancy,” said Dr. Jamieson, who serves on several ACOG committees.

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

Receiving a COVID-19 vaccine early in pregnancy is not associated with an increased risk for spontaneous abortion, new research suggests.

The study, published online in JAMA, evaluated the proportion of women who received the vaccine and had ongoing pregnancies in comparison with those who experienced a miscarriage or spontaneous abortion. The researchers analyzed data from 105,446 unique pregnancies over seven 4-week surveillance periods between December 2020 and June 2021. Ongoing pregnancies between 6 and 19 weeks’ gestation were identified on the last day of each 4-week surveillance period (index date). Spontaneous abortions were assigned to a 4-week surveillance period on the basis of their outcome date. There were 13,160 spontaneous abortions and 92,286 ongoing pregnancies.

Overall, a COVID-19 vaccine was received within 28 days prior to an index date among 8.0% of ongoing pregnancy surveillance periods versus 8.6% of spontaneous abortions.

“We’re hoping that this data can inform the ongoing conversations between providers and pregnant women [about the COVID-19 vaccines],” study author Elyse O. Kharbanda, MD, MPH, senior research investigator at HealthPartners Institute, told this news organization. “It should be considered in the context of all the data that’s coming out both on the risks of COVID infection and pregnancy and data on outcomes among women who are vaccinated and pregnant.”

Among the women whose pregnancies were followed, 7.8% received at least one dose of the Pfizer COVID-19 vaccine, 6% received at least one dose of the Moderna COVID-19 vaccine, and 0.5% received the Janssen vaccine.

In August, the American College of Obstetricians and Gynecologists (ACOG), the Centers for Disease Control and Prevention, and the Society for Maternal-Fetal Medicine strongly recommended that all pregnant women be vaccinated against COVID-19.

The new findings provide reassuring evidence about the safety of COVID vaccines, particularly mRNA vaccines, during pregnancy, said Denise J. Jamieson, MD, MPH, chair of the department of gynecology and obstetrics at Emory University, Atlanta, who was not involved in the study.

“The study design was a carefully conducted case-control study. Although ideally the best design for studying vaccine safety and efficacy is a randomized clinical trial, data are rapidly accumulating from a variety of sources that COVID vaccines are safe in pregnancy,” said Dr. Jamieson, who serves on several ACOG committees.

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

Pediatric Vaccines and Infectious Diseases Supplement

Contents:

• We’re getting closer to a lifesaving RSV vaccine
• New tool may provide point-of-care differentiation between bacterial, viral infections
• Metapneumovirus infections clinically indistinguishable from flu, RSV
• Seeking new vaccines against whooping cough: The PERISCOPE project
• Dried blood spot tests show sensitivity as cCMV screen

With Commentary by Kristina A. Bryant, MD

Pediatric Vaccines and Infectious Diseases Supplement

Contents:

• We’re getting closer to a lifesaving RSV vaccine
• New tool may provide point-of-care differentiation between bacterial, viral infections
• Metapneumovirus infections clinically indistinguishable from flu, RSV
• Seeking new vaccines against whooping cough: The PERISCOPE project
• Dried blood spot tests show sensitivity as cCMV screen

With Commentary by Kristina A. Bryant, MD

Pediatric Vaccines and Infectious Diseases Supplement

Contents:

• We’re getting closer to a lifesaving RSV vaccine
• New tool may provide point-of-care differentiation between bacterial, viral infections
• Metapneumovirus infections clinically indistinguishable from flu, RSV
• Seeking new vaccines against whooping cough: The PERISCOPE project
• Dried blood spot tests show sensitivity as cCMV screen

With Commentary by Kristina A. Bryant, MD

Many Americans are clamoring for a booster dose of a COVID-19 vaccine after reports of rising numbers of breakthrough infections, and demand increased after the Biden administration said those shots would be offered starting on Sept. 20.

That plan, which was first announced on Aug. 18, has raised eyebrows because it comes in advance of regulatory reviews by the Food and Drug Administration and recommendations from the Centers for Disease Control and Prevention. Those reviews are needed to determine whether third doses of these vaccines are effective or even safe. The move could have important legal ramifications for doctors and patients, too.

On Aug. 31, two high-level officials in the FDA’s Office of Vaccines Research and Review abruptly resigned amid reports that they were angry that the Biden administration was making decisions that should be left up to that agency.

So far, data show that the vaccines are highly effective at preventing the most severe consequences of COVID-19 – hospitalization and death – even regarding the Delta variant. The World Health Organization has urged wealthy nations such as the United States not to offer boosters so that the limited supply of vaccines can be directed to countries with fewer resources.
 

White House supports boosters

In a recent press briefing, Jeff Zients, the White House COVID-19 response coordinator, defended the move.

“You know, the booster decision, which you referenced ... was made by and announced by the nation’s leading public health officials, including Dr. Walensky; Dr. Fauci; Surgeon General Vivek Murthy; Dr. Janet Woodcock; the FDA acting commissioner, Dr. Francis Collins; Dr. Kessler; and others,” Mr. Zients said.

“And as our medical experts laid out, having reviewed all of the available data, it is in their clinical judgment that it is time to prepare Americans for a booster shot.”

He said a target date of Sept. 20 was announced so as to give states and practitioners time to prepare. He also said the move to give boosters was meant to help the United States stay ahead of a rapidly changing virus. Mr. Zients added that whether boosters will be administered starting on Sept. 20 depends on the FDA’s and CDC’s giving the go-ahead.

“Booster doses are going to be handled the same way all vaccines are handled,” said Kristen Nordlund, a CDC spokesperson. “Companies will have to provide data to FDA. FDA will have to make a decision and authorize the use of those, and ACIP [the Advisory Committee on Immunization Practices] will have to look at the evidence as well and make recommendations on top of FDA’s regulatory action,” she said.

Ms. Nordlund agreed that the planned Sept. 20 start date for boosters was something to which they aspired and was not necessarily set.

Historically, the FDA has needed at least 4 months to review a change to a vaccine’s approval, even on an accelerated schedule. Reviewers use that time to assess data regarding individual patients in a study, to review raw data, and essentially to check a drug company’s math and conclusions. The Biden administration’s timeline would shorten that review period from months to just a few weeks.
 

‘FDA in a very difficult position’

After the FDA approves, the ACIP of the CDC must meet to review the evidence and make recommendations on the use of the boosters in the United States.

Pfizer says it completed its submission for a supplemental biologics license application to the FDA on Aug. 27. To meet a Sept. 20 timeline, the entire process would have to be completed within 3 weeks.

“I don’t think that was handled, you know, ideally,” said Peter Lurie, MD, president of the Center for Science in the Public Interest and former associate commissioner of public health strategy and analysis at the FDA.

“It puts FDA in a very difficult position,” Dr. Lurie said. “It’s almost as if the decision has been made and they’re just checking a box, and that is, you know, contrary to the what FDA – at least the internal people at FDA – have been trying to do for ages.”

He said the agency took great pains with the emergency use authorizations and the full approvals of the vaccines to work as rapidly but thoroughly as possible. They did not skip steps.

“I think all of that reflected very well on the agency,” Dr. Lurie said. “And I think it worked out well in terms of trust in the vaccines.”

Although additional doses of vaccine are expected to be safe, little is known about side effects or adverse events after a third dose.

“It’s critical to wait for additional data and regulatory allowance for booster doses,” Sara Oliver, MD, a member of the CDC’s epidemic intelligence service, said in an Aug. 30 presentation to the ACIP, which is charged with making recommendations for use of all vaccines in the United States.
 

Boosters already being given

But after the White House announced that boosters were on the way, many people are not waiting.

Many health care practitioners and pharmacies have already been giving people third doses of vaccines, even if they are not among the immunocompromised – the group for which the shots are currently approved.

“You can walk into a pharmacy and ask for a third dose. Depending on which pharmacy you go to, you may get it,” said Helen Talbot, MD, associate professor of medicine at Vanderbilt University, Nashville, Tenn., and a member of the ACIP.

She says she has a friend who recently went for a checkup and was offered a third dose. His physician is already giving extra doses to everyone who is older than 65.

Dr. Talbot said that in fairness, pharmacies in the United States are throwing away doses of vaccine because they are expiring before they get used.

“Many of us may or may not be ready to give a third dose but would rather give someone a third dose than throw a vaccine away,” she said.
 

Consequences of a third shot

But giving or getting a third dose before approval by the FDA may have legal consequences.

In the ACIP meeting on Aug. 30, Demetre Daskalakis, MD, who leads vaccine equity efforts at the CDC, cautioned that physicians who give extra doses of the vaccine before the FDA and CDC have signed off may be in violation of practitioner agreements with the federal government and might not be covered by the federal PREP Act. The PREP Act provides immunity from lawsuits for people who administer COVID-19 vaccines and compensates patients in the event of injury. Patients who get a vaccine and suffer a rare but serious side effect may lose the ability to claim compensation offered by the act.

“Many of us gasped when he said that,” Dr. Talbot said, “because that’s a big deal.”

The ACIP signaled that it is considering recommending boosters for a much narrower slice of the American population than the Biden administration has suggested.

They said that so far, the data point only to the need for boosters for seniors, who are the patients most likely to experience breakthrough infections that require hospitalization, and health care workers, who are needed now more than ever and cannot work if they’re sick.

In a White House news briefing Aug. 31, CDC Director Rochelle Walensky, MD, was asked about the ACIP’s conclusions and whether she believed there were enough data to recommend booster shots for most Americans 8 months after their last dose.

“The ACIP did not review international data that actually has led us to be even more concerned about increased risk of vaccine effectiveness waning against hospitalization, severe disease, and death. They will be reviewing that as well,” she said.

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

Many Americans are clamoring for a booster dose of a COVID-19 vaccine after reports of rising numbers of breakthrough infections, and demand increased after the Biden administration said those shots would be offered starting on Sept. 20.

That plan, which was first announced on Aug. 18, has raised eyebrows because it comes in advance of regulatory reviews by the Food and Drug Administration and recommendations from the Centers for Disease Control and Prevention. Those reviews are needed to determine whether third doses of these vaccines are effective or even safe. The move could have important legal ramifications for doctors and patients, too.

On Aug. 31, two high-level officials in the FDA’s Office of Vaccines Research and Review abruptly resigned amid reports that they were angry that the Biden administration was making decisions that should be left up to that agency.

So far, data show that the vaccines are highly effective at preventing the most severe consequences of COVID-19 – hospitalization and death – even regarding the Delta variant. The World Health Organization has urged wealthy nations such as the United States not to offer boosters so that the limited supply of vaccines can be directed to countries with fewer resources.
 

White House supports boosters

In a recent press briefing, Jeff Zients, the White House COVID-19 response coordinator, defended the move.

“You know, the booster decision, which you referenced ... was made by and announced by the nation’s leading public health officials, including Dr. Walensky; Dr. Fauci; Surgeon General Vivek Murthy; Dr. Janet Woodcock; the FDA acting commissioner, Dr. Francis Collins; Dr. Kessler; and others,” Mr. Zients said.

“And as our medical experts laid out, having reviewed all of the available data, it is in their clinical judgment that it is time to prepare Americans for a booster shot.”

He said a target date of Sept. 20 was announced so as to give states and practitioners time to prepare. He also said the move to give boosters was meant to help the United States stay ahead of a rapidly changing virus. Mr. Zients added that whether boosters will be administered starting on Sept. 20 depends on the FDA’s and CDC’s giving the go-ahead.

“Booster doses are going to be handled the same way all vaccines are handled,” said Kristen Nordlund, a CDC spokesperson. “Companies will have to provide data to FDA. FDA will have to make a decision and authorize the use of those, and ACIP [the Advisory Committee on Immunization Practices] will have to look at the evidence as well and make recommendations on top of FDA’s regulatory action,” she said.

Ms. Nordlund agreed that the planned Sept. 20 start date for boosters was something to which they aspired and was not necessarily set.

Historically, the FDA has needed at least 4 months to review a change to a vaccine’s approval, even on an accelerated schedule. Reviewers use that time to assess data regarding individual patients in a study, to review raw data, and essentially to check a drug company’s math and conclusions. The Biden administration’s timeline would shorten that review period from months to just a few weeks.
 

‘FDA in a very difficult position’

After the FDA approves, the ACIP of the CDC must meet to review the evidence and make recommendations on the use of the boosters in the United States.

Pfizer says it completed its submission for a supplemental biologics license application to the FDA on Aug. 27. To meet a Sept. 20 timeline, the entire process would have to be completed within 3 weeks.

“I don’t think that was handled, you know, ideally,” said Peter Lurie, MD, president of the Center for Science in the Public Interest and former associate commissioner of public health strategy and analysis at the FDA.

“It puts FDA in a very difficult position,” Dr. Lurie said. “It’s almost as if the decision has been made and they’re just checking a box, and that is, you know, contrary to the what FDA – at least the internal people at FDA – have been trying to do for ages.”

He said the agency took great pains with the emergency use authorizations and the full approvals of the vaccines to work as rapidly but thoroughly as possible. They did not skip steps.

“I think all of that reflected very well on the agency,” Dr. Lurie said. “And I think it worked out well in terms of trust in the vaccines.”

Although additional doses of vaccine are expected to be safe, little is known about side effects or adverse events after a third dose.

“It’s critical to wait for additional data and regulatory allowance for booster doses,” Sara Oliver, MD, a member of the CDC’s epidemic intelligence service, said in an Aug. 30 presentation to the ACIP, which is charged with making recommendations for use of all vaccines in the United States.
 

Boosters already being given

But after the White House announced that boosters were on the way, many people are not waiting.

Many health care practitioners and pharmacies have already been giving people third doses of vaccines, even if they are not among the immunocompromised – the group for which the shots are currently approved.

“You can walk into a pharmacy and ask for a third dose. Depending on which pharmacy you go to, you may get it,” said Helen Talbot, MD, associate professor of medicine at Vanderbilt University, Nashville, Tenn., and a member of the ACIP.

She says she has a friend who recently went for a checkup and was offered a third dose. His physician is already giving extra doses to everyone who is older than 65.

Dr. Talbot said that in fairness, pharmacies in the United States are throwing away doses of vaccine because they are expiring before they get used.

“Many of us may or may not be ready to give a third dose but would rather give someone a third dose than throw a vaccine away,” she said.
 

Consequences of a third shot

But giving or getting a third dose before approval by the FDA may have legal consequences.

In the ACIP meeting on Aug. 30, Demetre Daskalakis, MD, who leads vaccine equity efforts at the CDC, cautioned that physicians who give extra doses of the vaccine before the FDA and CDC have signed off may be in violation of practitioner agreements with the federal government and might not be covered by the federal PREP Act. The PREP Act provides immunity from lawsuits for people who administer COVID-19 vaccines and compensates patients in the event of injury. Patients who get a vaccine and suffer a rare but serious side effect may lose the ability to claim compensation offered by the act.

“Many of us gasped when he said that,” Dr. Talbot said, “because that’s a big deal.”

The ACIP signaled that it is considering recommending boosters for a much narrower slice of the American population than the Biden administration has suggested.

They said that so far, the data point only to the need for boosters for seniors, who are the patients most likely to experience breakthrough infections that require hospitalization, and health care workers, who are needed now more than ever and cannot work if they’re sick.

In a White House news briefing Aug. 31, CDC Director Rochelle Walensky, MD, was asked about the ACIP’s conclusions and whether she believed there were enough data to recommend booster shots for most Americans 8 months after their last dose.

“The ACIP did not review international data that actually has led us to be even more concerned about increased risk of vaccine effectiveness waning against hospitalization, severe disease, and death. They will be reviewing that as well,” she said.

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

Many Americans are clamoring for a booster dose of a COVID-19 vaccine after reports of rising numbers of breakthrough infections, and demand increased after the Biden administration said those shots would be offered starting on Sept. 20.

That plan, which was first announced on Aug. 18, has raised eyebrows because it comes in advance of regulatory reviews by the Food and Drug Administration and recommendations from the Centers for Disease Control and Prevention. Those reviews are needed to determine whether third doses of these vaccines are effective or even safe. The move could have important legal ramifications for doctors and patients, too.

On Aug. 31, two high-level officials in the FDA’s Office of Vaccines Research and Review abruptly resigned amid reports that they were angry that the Biden administration was making decisions that should be left up to that agency.

So far, data show that the vaccines are highly effective at preventing the most severe consequences of COVID-19 – hospitalization and death – even regarding the Delta variant. The World Health Organization has urged wealthy nations such as the United States not to offer boosters so that the limited supply of vaccines can be directed to countries with fewer resources.
 

White House supports boosters

In a recent press briefing, Jeff Zients, the White House COVID-19 response coordinator, defended the move.

“You know, the booster decision, which you referenced ... was made by and announced by the nation’s leading public health officials, including Dr. Walensky; Dr. Fauci; Surgeon General Vivek Murthy; Dr. Janet Woodcock; the FDA acting commissioner, Dr. Francis Collins; Dr. Kessler; and others,” Mr. Zients said.

“And as our medical experts laid out, having reviewed all of the available data, it is in their clinical judgment that it is time to prepare Americans for a booster shot.”

He said a target date of Sept. 20 was announced so as to give states and practitioners time to prepare. He also said the move to give boosters was meant to help the United States stay ahead of a rapidly changing virus. Mr. Zients added that whether boosters will be administered starting on Sept. 20 depends on the FDA’s and CDC’s giving the go-ahead.

“Booster doses are going to be handled the same way all vaccines are handled,” said Kristen Nordlund, a CDC spokesperson. “Companies will have to provide data to FDA. FDA will have to make a decision and authorize the use of those, and ACIP [the Advisory Committee on Immunization Practices] will have to look at the evidence as well and make recommendations on top of FDA’s regulatory action,” she said.

Ms. Nordlund agreed that the planned Sept. 20 start date for boosters was something to which they aspired and was not necessarily set.

Historically, the FDA has needed at least 4 months to review a change to a vaccine’s approval, even on an accelerated schedule. Reviewers use that time to assess data regarding individual patients in a study, to review raw data, and essentially to check a drug company’s math and conclusions. The Biden administration’s timeline would shorten that review period from months to just a few weeks.
 

‘FDA in a very difficult position’

After the FDA approves, the ACIP of the CDC must meet to review the evidence and make recommendations on the use of the boosters in the United States.

Pfizer says it completed its submission for a supplemental biologics license application to the FDA on Aug. 27. To meet a Sept. 20 timeline, the entire process would have to be completed within 3 weeks.

“I don’t think that was handled, you know, ideally,” said Peter Lurie, MD, president of the Center for Science in the Public Interest and former associate commissioner of public health strategy and analysis at the FDA.

“It puts FDA in a very difficult position,” Dr. Lurie said. “It’s almost as if the decision has been made and they’re just checking a box, and that is, you know, contrary to the what FDA – at least the internal people at FDA – have been trying to do for ages.”

He said the agency took great pains with the emergency use authorizations and the full approvals of the vaccines to work as rapidly but thoroughly as possible. They did not skip steps.

“I think all of that reflected very well on the agency,” Dr. Lurie said. “And I think it worked out well in terms of trust in the vaccines.”

Although additional doses of vaccine are expected to be safe, little is known about side effects or adverse events after a third dose.

“It’s critical to wait for additional data and regulatory allowance for booster doses,” Sara Oliver, MD, a member of the CDC’s epidemic intelligence service, said in an Aug. 30 presentation to the ACIP, which is charged with making recommendations for use of all vaccines in the United States.
 

Boosters already being given

But after the White House announced that boosters were on the way, many people are not waiting.

Many health care practitioners and pharmacies have already been giving people third doses of vaccines, even if they are not among the immunocompromised – the group for which the shots are currently approved.

“You can walk into a pharmacy and ask for a third dose. Depending on which pharmacy you go to, you may get it,” said Helen Talbot, MD, associate professor of medicine at Vanderbilt University, Nashville, Tenn., and a member of the ACIP.

She says she has a friend who recently went for a checkup and was offered a third dose. His physician is already giving extra doses to everyone who is older than 65.

Dr. Talbot said that in fairness, pharmacies in the United States are throwing away doses of vaccine because they are expiring before they get used.

“Many of us may or may not be ready to give a third dose but would rather give someone a third dose than throw a vaccine away,” she said.
 

Consequences of a third shot

But giving or getting a third dose before approval by the FDA may have legal consequences.

In the ACIP meeting on Aug. 30, Demetre Daskalakis, MD, who leads vaccine equity efforts at the CDC, cautioned that physicians who give extra doses of the vaccine before the FDA and CDC have signed off may be in violation of practitioner agreements with the federal government and might not be covered by the federal PREP Act. The PREP Act provides immunity from lawsuits for people who administer COVID-19 vaccines and compensates patients in the event of injury. Patients who get a vaccine and suffer a rare but serious side effect may lose the ability to claim compensation offered by the act.

“Many of us gasped when he said that,” Dr. Talbot said, “because that’s a big deal.”

The ACIP signaled that it is considering recommending boosters for a much narrower slice of the American population than the Biden administration has suggested.

They said that so far, the data point only to the need for boosters for seniors, who are the patients most likely to experience breakthrough infections that require hospitalization, and health care workers, who are needed now more than ever and cannot work if they’re sick.

In a White House news briefing Aug. 31, CDC Director Rochelle Walensky, MD, was asked about the ACIP’s conclusions and whether she believed there were enough data to recommend booster shots for most Americans 8 months after their last dose.

“The ACIP did not review international data that actually has led us to be even more concerned about increased risk of vaccine effectiveness waning against hospitalization, severe disease, and death. They will be reviewing that as well,” she said.

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

People with breakthrough COVID-19 infections are two times more likely to be completely asymptomatic and are about two-thirds less likely to be hospitalized, compared with those who are unvaccinated, according to a new observational study.

Individuals infected with COVID-19 after receiving their first or second dose of either the Pfizer, Moderna, or AstraZeneca vaccine experienced a lower number of symptoms in the first week of infection, compared with those who did not receive a COVID-19 vaccine, reported the authors of the report in The Lancet Infectious Diseases. These patients also had a reduced need for hospitalization, compared with their unvaccinated peers. Those who received both doses of a vaccine were less likely to experience prolonged COVID - defined as at least 28 days of symptoms in this paper - compared with unvaccinated individuals.

“We are at a critical point in the pandemic as we see cases rising worldwide due to the delta variant,” study co–lead author Dr. Claire Steves, said in a statement. “Breakthrough infections are expected and don’t diminish the fact that these vaccines are doing exactly what they were designed to do – save lives and prevent serious illness.”

For the community-based, case-control study, Dr. Steves, who is a clinical senior lecturer at King’s College London, and her colleagues analyzed and presented self-reported data on demographics, geographical location, health risk factors, COVID-19 test results, symptoms, and vaccinations from more than 1.2 million UK-based adults through the COVID Symptom Study mobile phone app.

They found that, of the 1.2 million adults who received at least one dose of either the Pfizer, Moderna, or AstraZeneca vaccine, fewer than 0.5% tested positive for COVID-19 14 days after their first dose. Of those who received a second dose of a COVID-19 vaccine, 0.2% acquired the infection more than 7 days post vaccination.

Likelihood of severe symptoms dropped after one dose

After just one COVID-19 vaccine dose, the likelihood of experiencing severe symptoms from a COVID-19 infection dropped by a quarter. The odds of their infection being asymptomatic increased by 94% after the second dose. Researchers also found that vaccinated participants in the study were more likely to be completely asymptomatic, especially if they were 60 years or older.

Furthermore, the odds of those with breakthrough infections experiencing severe disease – which is characterized by having five or more symptoms within the first week of becoming ill – dropped by approximately one-third.

When evaluating risk factors, the researchers found that those most vulnerable to a breakthrough infection after receiving a first dose of Pfizer, Moderna, or Astrazeneca COVID-19 vaccine were older adults (ages 60 years or older) who are either frail or live with underlying conditions such as asthma, lung disease, and obesity.

The findings provide substantial evidence that there are benefits after just one dose of the vaccine, said Diego Hijano, MD, MSc, pediatric infectious disease specialist at St. Jude’s Children’s Research Hospital, Memphis. However, the report also supports caution around becoming lax on protective COVID-19 measures such as physical distancing and wearing masks, especially around vulnerable groups, he said.

Findings may have implications for health policies

“It’s also important for people who are fully vaccinated to understand that these infections are expected and are happening, especially now with the Delta variant” Dr. Hijano said. “While the outcomes are favorable, you need to still protect yourself to also protect your loved ones. You want to be very mindful that, if you are vaccinated and you get infected, you can pass it on to somebody that actually has not been vaccinated or has some of these risk factors.”

The authors of the new research paper believe their findings may have implications for health policies regarding the timing between vaccine doses, COVID-19 booster shots, and for continuing personal protective measures.

The authors of the paper and Dr. Hijano disclosed no conflicts.

People with breakthrough COVID-19 infections are two times more likely to be completely asymptomatic and are about two-thirds less likely to be hospitalized, compared with those who are unvaccinated, according to a new observational study.

Individuals infected with COVID-19 after receiving their first or second dose of either the Pfizer, Moderna, or AstraZeneca vaccine experienced a lower number of symptoms in the first week of infection, compared with those who did not receive a COVID-19 vaccine, reported the authors of the report in The Lancet Infectious Diseases. These patients also had a reduced need for hospitalization, compared with their unvaccinated peers. Those who received both doses of a vaccine were less likely to experience prolonged COVID - defined as at least 28 days of symptoms in this paper - compared with unvaccinated individuals.

“We are at a critical point in the pandemic as we see cases rising worldwide due to the delta variant,” study co–lead author Dr. Claire Steves, said in a statement. “Breakthrough infections are expected and don’t diminish the fact that these vaccines are doing exactly what they were designed to do – save lives and prevent serious illness.”

For the community-based, case-control study, Dr. Steves, who is a clinical senior lecturer at King’s College London, and her colleagues analyzed and presented self-reported data on demographics, geographical location, health risk factors, COVID-19 test results, symptoms, and vaccinations from more than 1.2 million UK-based adults through the COVID Symptom Study mobile phone app.

They found that, of the 1.2 million adults who received at least one dose of either the Pfizer, Moderna, or AstraZeneca vaccine, fewer than 0.5% tested positive for COVID-19 14 days after their first dose. Of those who received a second dose of a COVID-19 vaccine, 0.2% acquired the infection more than 7 days post vaccination.

Likelihood of severe symptoms dropped after one dose

After just one COVID-19 vaccine dose, the likelihood of experiencing severe symptoms from a COVID-19 infection dropped by a quarter. The odds of their infection being asymptomatic increased by 94% after the second dose. Researchers also found that vaccinated participants in the study were more likely to be completely asymptomatic, especially if they were 60 years or older.

Furthermore, the odds of those with breakthrough infections experiencing severe disease – which is characterized by having five or more symptoms within the first week of becoming ill – dropped by approximately one-third.

When evaluating risk factors, the researchers found that those most vulnerable to a breakthrough infection after receiving a first dose of Pfizer, Moderna, or Astrazeneca COVID-19 vaccine were older adults (ages 60 years or older) who are either frail or live with underlying conditions such as asthma, lung disease, and obesity.

The findings provide substantial evidence that there are benefits after just one dose of the vaccine, said Diego Hijano, MD, MSc, pediatric infectious disease specialist at St. Jude’s Children’s Research Hospital, Memphis. However, the report also supports caution around becoming lax on protective COVID-19 measures such as physical distancing and wearing masks, especially around vulnerable groups, he said.

Findings may have implications for health policies

“It’s also important for people who are fully vaccinated to understand that these infections are expected and are happening, especially now with the Delta variant” Dr. Hijano said. “While the outcomes are favorable, you need to still protect yourself to also protect your loved ones. You want to be very mindful that, if you are vaccinated and you get infected, you can pass it on to somebody that actually has not been vaccinated or has some of these risk factors.”

The authors of the new research paper believe their findings may have implications for health policies regarding the timing between vaccine doses, COVID-19 booster shots, and for continuing personal protective measures.

The authors of the paper and Dr. Hijano disclosed no conflicts.

People with breakthrough COVID-19 infections are two times more likely to be completely asymptomatic and are about two-thirds less likely to be hospitalized, compared with those who are unvaccinated, according to a new observational study.

Individuals infected with COVID-19 after receiving their first or second dose of either the Pfizer, Moderna, or AstraZeneca vaccine experienced a lower number of symptoms in the first week of infection, compared with those who did not receive a COVID-19 vaccine, reported the authors of the report in The Lancet Infectious Diseases. These patients also had a reduced need for hospitalization, compared with their unvaccinated peers. Those who received both doses of a vaccine were less likely to experience prolonged COVID - defined as at least 28 days of symptoms in this paper - compared with unvaccinated individuals.

“We are at a critical point in the pandemic as we see cases rising worldwide due to the delta variant,” study co–lead author Dr. Claire Steves, said in a statement. “Breakthrough infections are expected and don’t diminish the fact that these vaccines are doing exactly what they were designed to do – save lives and prevent serious illness.”

For the community-based, case-control study, Dr. Steves, who is a clinical senior lecturer at King’s College London, and her colleagues analyzed and presented self-reported data on demographics, geographical location, health risk factors, COVID-19 test results, symptoms, and vaccinations from more than 1.2 million UK-based adults through the COVID Symptom Study mobile phone app.

They found that, of the 1.2 million adults who received at least one dose of either the Pfizer, Moderna, or AstraZeneca vaccine, fewer than 0.5% tested positive for COVID-19 14 days after their first dose. Of those who received a second dose of a COVID-19 vaccine, 0.2% acquired the infection more than 7 days post vaccination.

Likelihood of severe symptoms dropped after one dose

After just one COVID-19 vaccine dose, the likelihood of experiencing severe symptoms from a COVID-19 infection dropped by a quarter. The odds of their infection being asymptomatic increased by 94% after the second dose. Researchers also found that vaccinated participants in the study were more likely to be completely asymptomatic, especially if they were 60 years or older.

Furthermore, the odds of those with breakthrough infections experiencing severe disease – which is characterized by having five or more symptoms within the first week of becoming ill – dropped by approximately one-third.

When evaluating risk factors, the researchers found that those most vulnerable to a breakthrough infection after receiving a first dose of Pfizer, Moderna, or Astrazeneca COVID-19 vaccine were older adults (ages 60 years or older) who are either frail or live with underlying conditions such as asthma, lung disease, and obesity.

The findings provide substantial evidence that there are benefits after just one dose of the vaccine, said Diego Hijano, MD, MSc, pediatric infectious disease specialist at St. Jude’s Children’s Research Hospital, Memphis. However, the report also supports caution around becoming lax on protective COVID-19 measures such as physical distancing and wearing masks, especially around vulnerable groups, he said.

Findings may have implications for health policies

“It’s also important for people who are fully vaccinated to understand that these infections are expected and are happening, especially now with the Delta variant” Dr. Hijano said. “While the outcomes are favorable, you need to still protect yourself to also protect your loved ones. You want to be very mindful that, if you are vaccinated and you get infected, you can pass it on to somebody that actually has not been vaccinated or has some of these risk factors.”

The authors of the new research paper believe their findings may have implications for health policies regarding the timing between vaccine doses, COVID-19 booster shots, and for continuing personal protective measures.

The authors of the paper and Dr. Hijano disclosed no conflicts.