The vaccines, however, showed a decreased ability to neutralize the strain now dominant in South Africa, worrying some researchers and prompting Pfizer and BioNTech to announce they were taking necessary steps to develop a booster shot or updated vaccine. A day after Pfizer’s announcement, a top White House coronavirus adviser said each vaccine developer is planning to update shots to address variants.
“Each of the vaccine companies — and I’ve talked to all of them, both the ones approved and the candidates — have plans to continue to update their vaccines and, if need be, create boosters down the road if there continue to be additional mutants, as there likely will be,” Andy Slavitt said during a Washington Post live interview on Thursday.
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