Lab studies: Pfizer, Moderna vaccines protect against new coronavirus variants

By Amanda Sealy and John Bonifield, CNN

(CNN) — A new report published in the New England Journal of Medicine on Wednesday suggests that Pfizer-BioNTech’s Covid-19 vaccine can protect people against concerning new coronavirus variants, including one first seen in South Africa called B.1.351.

For the study, researchers at Pfizer and the University of Texas Medical Branch genetically engineered versions of the virus to carry some of the mutations found in B.1.351. They tested them against blood samples taken from 15 people who had received two doses of the Pfizer/BioNTech vaccine as part of a clinical trial.

While the blood serum samples produced less neutralizing antibody activity, it was

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