More studies show Pfizer and Moderna COVID-19 vaccines protect against worrisome variants

Vaccination site in Maryland
(Image credit: Chip Somodevilla/Getty Images)

The Pfizer-BioNTech COVID-19 vaccine is extremely effective against two dangerous variants of the coronavirus, the B.1.1.7 strain first found in the United Kingdom and the B.1.351 variant discovered in South Africa, researchers reported Wednesday in the New England Journal of Medicine and The Lancet.

Moderna also reported Wednesday that, according to early results from its booster shot trial, a third dose of its vaccine given six to eight months after the first two doses boosted antibodies to protect against the South African B.1.351 variant and other worrisome strain found in Brazil. Moderna is testing its original vaccine and a version modified to target the B.1.351 variant.

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