Fall begins Sunday and with the change of seasons, a new COVID subvariant that started circulating in Europe over the summer has made its way to the U.S.
Called XEC, this emerging sublineage stems from the Omicron variant of SARS-CoV-2, the coronavirus that causes COVID-19. The strain had been detected in at least 15 countries and 12 U.S. states as of Sept. 3, according to Outbreak.info, a Scripps Research COVID database.
