myocarditis

Another example might be myocarditis, an important cause of sudden cardiac death that is more common in men than women, at least until the age of 50 or menopause.

“There is a generally acknowledged myocarditis side effect to the mRNA vaccines, predominantly in young men, and it's invariably in the States been non-fatal,” Moore told Salon in a phone interview.

But federal researchers trailed Israeli scientists in picking up myocarditis as a problem among young men.

Despite surveillance efforts, U.S. officials were not the first to identify a significant Covid vaccine side effect: myocarditis in young people receiving mRNA vaccines.

Traditionally, the focus has been on heart inflammation known as myocarditis, which is often triggered by the body's immune response to a viral infection.