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Emerging Coronavirus Variants May Pose Challenges to Vaccines – The New York Times

Laboratory studies of mutations circulating in South Africa suggest they may dodge some of the body’s immune responses.



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Neither the South African variant nor a similar mutant virus in Brazil has yet been detected in the United States. (The more contagious variant that has blazed through Britain does not contain these mutations and seems to be susceptible to vaccines.)
Fears that the vaccines would be powerless against new variants intensified at a scientific conference held online on Saturday, when South African scientists reported that in laboratory tests, serum samples from 21 of a group of 44 Covid-19 survivors…

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