Pfizer Says Its Covid Vaccine Works Against Key Mutation

Pfizer and BioNTech announced on Friday that their Covid vaccine is effective against one of the mutations present in the new contagious variants identified in Britain and South Africa. Independent experts said the findings were good news, but cautioned that each of those coronavirus variants has several other potentially dangerous mutations that have not yet been investigated. So it’s possible that one of those mutations affects how well the vaccine works. “It’s the first step in the right direction,” said Dr. John Brooks, the chief medical officer for the Centers for Disease Control Covid-19 emergency response. “I’m hoping that the additional work that comes out in the future will fall in line with that finding.”