New COVID Variant of ‘Concern’ Drives U.S. Travel Bans
The World Health Organization on Friday classified a new COVID-19 variant from South Africa as a “variant of concern,” which means it could be more contagious, cause more severe disease and reduce the efficacy of vaccines and treatments.
The World Health Organization on Friday classified a new COVID-19 variant from South Africa as a “variant of concern,” which means it could be more contagious, cause more severe disease and reduce the efficacy of vaccines and treatments.