Two cases of the coronavirus variant that first raised alarms in South Africa have been found in South Carolina, marking the first confirmed instance of the mutation in the U.S.
The arrival of the South Africa variant, known as B.1.351, follows the appearances of separate mutations spawned in the U.K. and Brazil. The U.K. variant has been found in more than 20 American states. The Brazil variant was identified for the first time in the U.S. this week, in a Minnesota resident who recently returned from a trip to that country.
