Myocarditis and Pericarditis after COVID-19mRNA Vaccines

Early Reports of Myocarditis and Pericarditis Following COVID-19 Vaccination

In April 2021, an Israeli news release reported 62 cases of myocarditis out of approximately five million doses of Pfizer-BioNTech vaccine administered. Out of 20O of these cases, 56 occurred after dose 2, with most occurring in men younger than 30 years of age.

In April 2021, 23 cases of symptomatic acute myocarditis presented within four days following COVID-19 mRNA vaccination (seven with Pfizer-BioNTech, 16 with Moderna) were reported by the US Department of Defence in healthy military members; twenty of which occurred after the second dose.