Autopsy-based histopathological characterization of myocarditis after anti-SARS-CoV-2-vaccination
4 of 25 (16%) of those who “died suddenly” within 20 days of recent vaccination had myocarditis from the vaccination (with other causes of death ruled out); COVID-19 vaccine-induced myocarditis
https://link.springer.com/article/10.1007/s00392-022-02129-5
(German study published Nov 2022)