Home Risk Management/Safety CDC Study Finds Substantial US Increase in Invasive Group A Strep Infections CDC Study Finds Substantial US Increase in Invasive Group A Strep Infectionsadmin Apr 09, 2025 comments offA surveillance study of 10 US states shows the incidence of invasive group A Streptococcus (GAS) infection more than doubled from 2013 through 2022, researchers reported in JAMA.