The Centers for Disease Control is investigating a small number of young adults and adolescents who may have experienced heart problems after a COVID-19 vaccine, although the agency stressed that it is not clear that the vaccine is the right one. responsible.
There have been “relatively few” reports of myocarditis and “most cases appear to be mild,” but the COVID-19 Vaccine Safety Technical Working Group said it considered the potential problem should be communicated to suppliers. .
The CDC noted that mRNA vaccines, made by Moderna and Pfizer-BioNTech, are causing the problem.
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Reports of myocarditis have occurred mostly in adolescents and young adults, are more common in men than in women, usually occur after the second dose, and appear about 4 days after vaccination.
The COVID-19 vaccine safety technical working group discussed the issue during a May 17 meeting and the New York Times first reported the news on Saturday.
The FDA approved the use of the Pfizer vaccine for children up to the age of 12 earlier this month after a success in a trial in which more than 2,000 American volunteer teens were shot.
A 16-year-old patient receives a candidate dose for the Pfizer coronavirus vaccine at Cincinnati Children’s Hospital. (Photo courtesy of Cincinnati Children’s)
Modern also seeks approval for its teen vaccine, saying its vaccine has been shown to be safe and effective in 12- to 17-year-olds.
According to a study published last year in the medical journal StatPearls, there are approximately 1.5 million cases of myocarditis each year, amounting to 10 to 20 cases per 100,000 people.
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Viral infections are the most common cause of the disease, but bacteria, cancer, and exposure to environmental toxins can also cause myocarditis.
The Department of Defense said last month that it is studying 14 cases of possible myocarditis in people who were vaccinated by the military.
CDC director Rochelle Walensky said they have found no link between vaccines and inflammation of the heart or myocarditis.
“We didn’t see any signal and in fact we intentionally looked for the signal in the more than 200 million doses we did,” Dr. Walensky at a White House briefing on April 27th.
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More than 162 million Americans have received at least one dose of a COVID-19 vaccine. According to the CDC, some 4.6 million Americans between the ages of 12 and 18 have received a dose.
The CDC noted that rates of myocarditis in young adults after the COVID-19 vaccine “have not differed from expected baseline rates.”
Some doctors and health experts have also argued that COVID-19 can cause myocarditis and other heart damage, but this link is still being studied.
The Associated Press contributed to this report.