For patients in Israel’s largest healthcare system, Clalit Health Services, the estimate of myocarditis was 2.13 cases per 100,000 vaccinated persons, reaching as high as 10.69 cases per 100,000 in men and boys ages 16 to 29.
A separate study using Israel’s government database, capturing active and passive periods of surveillance for myocarditis, supported the higher risk in young men. In this report, males of all ages had myocarditis occur at 0.64 cases per 100,000 persons after the first dose and 3.83 cases per 100,000 after the second dose — with the incidence increasing to 1.34 and 15.07 per 100,000 after the first and second doses, respectively, for teenage boys ages 16 to 19.
https://www.medpagetoday.com/infectiousdisease/covid19vaccine/94892