BA.2 Accounts for Over Half of New U.S. Cases, C.D.C. Estimates

According to estimates from the Centers for Disease Control and Prevention on Tuesday, the highly contagious Omicron subvariant known as BA.2, which led to a surge of coronavirus cases in Europe, is now the dominant version of the virus in new U.S. cases.Last week, the World Health Organization reiterated that BA.2 was the dominant version…