> What percentage of men under 40 have had a cardiovascular event, specifically myocarditis, after taking the Phizer or Moderns shot?

https://www.health.harvard.edu/blog/new-information-for-pare...

> Doing the math, the Centers for Disease Control and Prevention (CDC) notes that for every million doses given, there have been 67 cases of heart inflammation in boys 12 to 17 (nine in girls of that age group), 56 in those aged 18 to 24 (six in girls), and 20 in males 25 to 29 (three in girls).

It's not exactly "under 40", but if you're in that 25-29 age group, it's 0.002%. If you're in that higher-risk 12-17s group, 0.0067%.

I'm fairly comfortable rounding that down to 0% for my personal risk evaluations, especially given "majority of cases have been mild".