U.S. scientists said Wednesday that there was a “likely association” between mRNA Covid-19 vaccines and an elevated risk of heart issues in adolescents and young adults, the strongest statement yet on the link between the two.
Younger groups, particularly men under 30, have higher rates of myocarditis (inflammation of the heart muscle) and pericarditis (inflammation of the lining around the heart) following vaccination with the shots from Moderna or Pfizer-BioNTech. Most cases have occurred soon after the second shot of the two-dose regimens.