The Pfizer and Moderna COVID vaccines are both linked to heart inflammation. In May, the U.S. Food and Drug Administration authorized Pfizer’s vaccine for 12- to 17-year-olds, but the agency is delaying its decision on authorizing Moderna’s vaccine for adolescents while it assesses whether the shot could increase the risk of myocarditis.
The U.S. Food and Drug Administration (FDA) said on Oct. 15 it was delaying a decision on authorizing Moderna’s COVID vaccine for adolescents while the agency assesses whether the shot could increase the risk of myocarditis, a heart inflammatory condition, the Wall Street Journal reported.
It was also in June that Moderna filed for authorization in the U.S. of its vaccine for adolescents 12 through 17 years old.
The FDA’s review of Moderna’s application is ongoing, an FDA spokesperson told Reuters, adding that while the agency cannot predict how long the process may take, it is evaluating the data as expeditiously as possible.
After four Nordic countries on Oct. 6 suspended use of Moderna’s vaccine in younger age groups, the FDA said it is taking another look at the risk of the condition, known as myocarditis, among younger men who took Moderna’s vaccine, compared with those who received the vaccine from Pfizer-BioNTech, people familiar with the matter said.
Europe’s drug regulator in July found that inflammatory heart conditions could occur in “very rare” cases following vaccination with the Moderna and Pfizer vaccines, and are more common in younger men after the second dose. However, the regulator stressed the benefits of the shots outweighed any risks.
Scientists concerned mRNA boosters could cause heart inflammation in young adults
The risk of mRNA COVID booster shots causing heart inflammation in young adults continues to worry top scientists, Dr. Ofer Levy, director of the Precision Vaccines Program at Boston Children’s Hospital and voting member of the FDA’s advisory panel, said last week.
Levy spoke just hours after the FDA Vaccines and Related Biological Products Advisory Committee unanimously recommended giving second doses of the Johnson & Johnson (J&J) COVID vaccine to anyone 18 and older who took the first dose, CNBC reported.
The J&J vaccine is the only single-shot COVID vaccine authorized for emergency use in the U.S. — the second dose is considered a booster.
On Sept. 17, the FDA advisory panel recommended the agency approve boosters of Moderna and Pfizer for all seniors and other high-risk groups but did not recommend a third dose for people in high-risk jobs.
Some committee members voiced concern about authorizing a third mRNA dose for people 12 and older, due to the risk of two rare heart inflammation conditions — myocarditis and pericarditis.
“As we go into younger and younger age groups, they’re less and less at personal risk of severe COVID, and on the other hand, somewhat more at risk of this inflammatory heart condition with the mRNA vaccine,” Levy told CNBC’s Closing Bell.
Levy added, “So it’s a risk-benefit analysis, and that’s why you’re seeing that deliberation.”
According to researchers at the National Organization for Rare Disorders, myocarditis can result from infections, but “more commonly the myocarditis is a result of the body’s immune reaction to the initial heart damage.”
Severe myocarditis can permanently damage the heart muscle, possibly causing heart failure.
According to Mayo Clinic, pericarditis is swelling and irritation of the thin, saclike tissue surrounding the heart (pericardium), often associated with sharp chest pain and other symptoms.
Myocarditis has occurred mostly in male adolescents and young adults who received a vaccine from Pfizer or Moderna, according to the Centers for Disease Control and Prevention (CDC). Cases typically arise within days of vaccination, usually after the second dose, and subside with medicine and rest, the agency said.
According to the most recent data from the Vaccine Adverse Event Reporting System (VAERS) — the primary government-funded system for reporting adverse vaccine reactions in the U.S — there have been 529 U.S. reports of myocarditis and pericarditis with 521 cases attributed to Pfizer’s vaccine among adolescents 12 to 18 years old.
Between Dec. 14, 2020 and Oct. 8, a total of 2,818 U.S. cases of myocarditis and pericarditis in all age groups were reported, with 1,782 cases attributed to Pfizer, 915 cases to Moderna and 111 cases to J&J’s COVID vaccine.
Reports submitted to VAERS require further investigation before a causal relationship can be confirmed. Historically, VAERS has been shown to report only 1% of actual vaccine adverse events.
French heath regulator suspends Moderna boosters over myocarditis concerns
France’s health regulator said Oct. 15. it would no longer allow booster doses of Moderna’s COVID vaccine, RFI reported. Only Pfizer-BioNTech’s vaccine will be used for the booster campaign moving forward.
The new recommendation applies to people over 65, immunocompromised people and their relatives and people at risk — including healthcare workers.
The announcement came amid reports that Sweden, Denmark, Norway, Iceland and Finland suspended use of Moderna’s COVID vaccine for certain age groups amid reports of heart inflammation.
At the beginning of the month, Sweden and Finland suspended the use of Moderna for those under 30. Denmark and Norway formally advised against Moderna for people under 18, while Iceland suspended the use of U.S. mRNA vaccines as a booster dose altogether.
Risk of myocarditis associated with Pfizer’s COVID vaccine ignored
As The Defender previously reported, details leaked from an Israeli Health Ministry report as early as April raised concerns among experts about a possible link between the Pfizer’s COVID vaccine and myocarditis.
The preliminary report by a committee tasked with monitoring vaccine side effects found 62 cases of myocarditis, including two deaths, in people who received the Pfizer vaccine. Fifty-six of the cases occurred after the second dose of the vaccine, and 55 cases occurred in men — most between the ages of 18 and 30.
Israel’s pandemic response coordinator, Nachman Ash, confirmed “tens of incidents” of myocarditis occurred in vaccinated people, primarily after the second dose, but emphasized the health ministry had yet to draw any conclusions.
Israeli researchers presented their findings to the Israeli Health Ministry Director-General, Pfizer, CDC and FDA.
EU regulators in May called on Pfizer and Moderna to provide additional data related to the companies’ COVID vaccines and a potential link to heart inflammation after the agency completed a safety review of all four COVID vaccines authorized for emergency use in the EU.
The CDC began investigating reports of myocarditis in teenagers and young adults vaccinated against COVID vaccines in May.
The CDC’s Advisory Committee on Immunization Practices (ACIP) in a May 17 statement said reports of myocarditis to date seemed to occur predominantly in adolescents and young adults, more often in males than females, more often following the second dose and typically within four days after vaccination. Most cases appeared to be “mild” and follow-up is ongoing.
According to the latest assessment published by the ACIP on Aug. 30, “data available to date suggest an association of myocarditis with mRNA vaccination in adolescents and young adults.”