The B.1.1.7 variant, first identified in Britain, is now the source of most new coronavirus infections in the United States, the director of the Centers for Disease Control and Prevention said.The B.1.1.7 variant, first identified in Britain, is now the source of most new coronavirus infections in the United States, the director of the Centers for Disease Control and Prevention said.Coronavirus (2019-nCoV), Disease Rates, Deaths (Fatalities), Vaccination and Immunization, Centers for Disease Control and Prevention, Walensky, Rochelle, Biden, Joseph R Jr, United States Politics and Government, American Rescue Plan (2021)Read More