LONDON (REUTERS) - British scientists expressed concern on Monday that Covid-19 vaccines being rolled out in Britain may not be able to protect against a new variant of the coronavirus that emerged in South Africa and has spread internationally.
This is an update of an article originally published on November 24, 2020. New data is coming in on the efficacy of the various vaccines, and the Pfizer-BioNTech and Moderna vaccines are being distributed in the U.S. and other countries.
