In a detailed analysis of nearly 43 million people, ages 13 and older, who received at least one dose of a COVID-19 vaccine in England, the risk of myocarditis in unvaccinated individuals after COVID-19 infection was at least 11 times higher compared to people who developed myocarditis after receiving a COVID-19 vaccine or booster dose between December 1, 2020 and December 15, 2021, according to new research published today in the American Heart Association’s flagship, peer-reviewed journal Circulation.