WHO updates coronavirus face mask guidance, says face shields are inferior alternative Fox NewsU.S. Covid Cases Found as Early as December 2019, Says Study Bloomberg Quicktake: NowThe latest on the coronavirus pandemic and vaccines: Live updates CNNCoronavirus News LIVE Updates: US Scientists Developing Nasal Spray to Prevent Covid-19; More Than 2,500 US Virus Deaths in 24 Hours Yahoo India NewsCoronavirus was present in US earlier than initially thought: CDC scientists | TheHill The HillView Full Coverage on Google News