Covid KP.3 Coronavirus is prevalent in the United States: What are the symptoms?

New "FLiRT" coronavirus variants, including KP.2 and KP.3 that are now dominant, are on the rise in the United States. Experts discuss symptoms, transmission, and vaccines. A new FLiRT coronavirus variant called KP.3 is now the dominant strain in the United States, accounting for about a third of all cases. KP.3 is part of a family of highly contagious variants that are causing an increasing proportion of infections, raising concerns about a summer surge.

FLiRT strains—which include KP.3, KP.2, and KP.1.1—are the latest omicron sub-products to gain dominance. As of June 21, they account for nearly two-thirds of COVID-19 cases nationwide, according to data from the U.S. Centers for Disease Control and Prevention.