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The team of researchers showed that two variants, B.1.1.7 (Alpha) variant and B.1.351 (Beta), showed reduced antibody levels in individuals vaccinated with the Pfizer vaccine or previously infected by the virus.
The Beta variant was first identified in South Africa, where it has dominated. It was first recorded in the UK in December, before the Delta variant.
Alpha on the other hand, which was first identified in the UK, is considered a variant of concern by the World Health Organisation, which noted it might have increased severity based on hospitalisation and fatality rates.
Co-senior author Fikadu Tafesse, assistant professor of molecular microbiology and immunity in the OHSU School of Medicine said: “We know that the virus continues to evolve for its own advantage.”
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