Research Study: Risk of myocarditis after the first and second doses of Covid-19 vaccines was highest in males 16-24 years.
A study published in the Journal of the American Medical Association shows the SARS-CoV-2 messenger RNA (mRNA) vaccination associated with risk of myocarditis with participants from Denmark, Finland Norway and Sweden.
https://jamanetwork.com/journals/jamacardiology/fullarticle/2791253
Results of this large cohort study indicated that both first and second doses of mRNA vaccines were associated with increased risk of myocarditis and pericarditis. For individuals receiving 2 doses of the same vaccine, risk of myocarditis was highest among young males (aged 16-24 years) after the second dose. These findings are compatible with between 4 and 7 excess events in 28 days per 100,000 vaccinees after BNT162b2, and between 9 and 28 excess events per 100,000 vaccinees after mRNA-1273. This risk should be balanced against the benefits of protecting against severe COVID-19 disease.
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