Pfizer and BioNTech have confirmed their vaccine is effective against the UK and South African variants of coronavirus.
Early studies by Pfizer and the University of Texas Medical Branch, which have not yet been peer reviewed, showed a less than two-fold reduction in antibody levels against the South African mutation.
This suggests the vaccine would only lose a small amount of effectiveness, and would successfully be able to neutralise the virus.
The study was conducted on blood taken from people who had received the vaccine.
But the findings are limited because they do not look at the full set of mutations found in the new South African variant.
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