KP.3.1.1, a variant from the Omicron family, is one of several JN.1-derived variants currently circulating in the US, according to Xinhua news agency. For the two-week period ending August 17, KP.3.1.1 is estimated to account for 31% to 43% of Covid-19 clinical specimens, up from 20% to 26% in the previous two-week period ending August 3, as per the latest CDC data.
