The CDC marked a major uptick in group A strep cases in 10 U.S. states from 2013 to 2022. Here's what to know about risk of more severe infection and spread.

Group A Streptococcus (GAS) infection by serotype M18 strains causes acute rheumatic fever (ARF) and can lead to pediatric heart disease. In the April 2 Proceedings of the National Academy of Sciences ...