• Reuters

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Pfizer Inc. and BioNTech’s COVID-19 vaccine appeared to only lose a small bit of effectiveness against an engineered virus with three key mutations from the new variant found in South Africa, according to a laboratory study conducted by the U.S. drugmaker.

The study by Pfizer and scientists from the University of Texas Medical Branch (UTMB), which has not yet been peer-reviewed, showed a less than twofold reduction in antibody titer levels, indicating the vaccine would likely still be effective in neutralizing a virus with the so-called E484K and N501Y mutations found in the South African variant.

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