The CDC has noted that among the 165 million people who, by late May, received at least one dose, a few dozen reported non-fatal heart inflammation. CDC investigators have not yet declared if it is vaccine-caused or coincidental.
As of mid-June 2021, the CDC continued to recommend COVID-19 vaccine for everyone over age 12.
A social media post overstates the CDC's findings regarding a handful of unsubstantiated reports of vaccine-triggered myocarditis and percarditis. Myocarditis is inflammation of the heart muscle and pericarditis is inflammation of the outer lining.
A large number of bacteria and viruses can cause the condition, including flu, strep, common cold and Lyme disease, according to Children's Hospital of Philadelphia. Patients can typically return to normal activities after the symptoms subside.