"People infected with COVID-19 before receiving a vaccine were 11 times more at risk for developing myocarditis within 28 days of testing positive for the virus. But that risk was cut in half if a person was infected after receiving at least one dose of a COVID-19 vaccine."
https://www.heart.org/en/news/2022/08/22/covid-19-infection-...
"Risk of incident myocarditis is more than seven times higher in persons who were infected with the SARS-CoV-2 than in those who received the COVID-19 vaccines"
https://www.frontiersin.org/articles/10.3389/fcvm.2022.95131...
"The incidences of myopericarditis after mRNA COVID-19 vaccination among adolescents aged 12–17 years were very rare; they were not higher than other important reference incidences."
https://www.sciencedirect.com/science/article/pii/S0264410X2...