Growing Number of Recurrent, Relapsing Cases of Myocarditis Reported After COVID-19 Vaccination

‘More research is warranted on factors that may predispose patients to vaccine-associated cardiac injury,’ researchers said.

A healthcare worker reaches for COVID-19 vaccines at a vaccination site in Los Angeles on Feb. 16, 2021. Apu Gomes/AFP via Getty Images

A growing number of cases of recurrent and/or relapsing cases of myocarditis after COVID-19 vaccination are being reported by doctors in medical journals.

One of the newest papers, in the August edition of Vaccine: X, describes two 16-year-old boys who experienced myocarditis after their second doses of Pfizer’s vaccine.