study published in the journal JAMA on Aug. 4 found that the chances of developing heart inflammation after receiving the COVID-19 vaccine were minimal and the complications were short-lived.
Evidence of temporary heart inflammation after receiving a COVID-19 vaccine was reported in mostly adolescent males ages 16 or older and it happened more frequently after patients received their second dose, according to the U.S.
Centers for Disease Control and Prevention. "Myocarditis is inflammation of the heart muscle, and pericarditis is inflammation of the outer lining of the heart.
In both cases, the body’s immune system causes inflammation in response to an infection or some other trigger," according to the CDC’s website.