The U.S. Centers for Disease Control and Prevention advisory group is investigating a few reports of heart inflammation in teenagers and young adults who have received COVID-19 vaccines.
The condition, called myocarditis, often goes away without complications and can be caused by a variety of viruses, the CDC group said.
Researchers have found that it seems to impact more men than women, but Doctor David Agus of USC points out it's a very rare issue.
Health officials now say that fully vaccinated Americans can skip getting tested for COVID-19 -- even if they were exposed to someone who is infected.
They say people who are fully vaccinated face little risk of developing serious illness or passing the infection onto others.
Dr. Amesh Adalja, a senior scholar at the Johns Hopkins Center for Health Security, told Reuters that vaccines are known to cause myocarditis, but it’s vitally important that researchers compare the risk to benefit ratio when looking at this. "Vaccines are going to unequivocally be much more beneficial outweighing this very low, if conclusively established, risk."