At least 52 new cases of the fast-spreading coronavirus have been reported across the United States.<br />This includes the first cases in Tennessee, Texas and the city of San Francisco.<br />The number of people with the illness in Washington state nearly doubled to 70.<br />Reuters reports 20 new cases of the virus have been confirmed in King County, Washington.<br />Those new cases bring the total in the county to 51 with 10 deaths.
