Cases of heart inflammation after COVID-19 vaccination were more common among Moderna recipients than those who received Pfizer’s shot, according to a new study. A nurse prepares a COVID-19 vaccine in Toronto, Canada, in a March 23, 2021, file photograph. (Cole Burston/Getty Images) Canadian researchers analyzed a database and identified 141 cases of myocarditis, a form of heart inflammation, within 21 days of a dose of the Pfizer or Moderna vaccine, both of which utilize messenger RNA (mRNA) technology.
That was compared with an expected number of just 20 cases.
Cases were much higher for young males, as previous studies have found, but were elevated even higher following receipt of a second dose of the Moderna vaccine compared with a second dose of the Pfizer shot.
The incidence, though, was higher after receipt of a third dose of the Pfizer vaccine.“In this population-based cohort study, observed rates of hospital admissions or emergency […]
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