Covid vaccine: Which Covid-19 vaccines could need a booster?

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The South African and Brazil versions both present with higher infectivity rates, while the British variant also has a higher fatality rate.

Variants acquired a mutation named E484K which allows it to bypass protections provided by the new jabs.

Dr Simon Clarke, Associate Professor in Cellular Microbiology, University of Reading, explains they would hamper the body’s ability to respond to the virus.

He said: “In lab studies, this mutation meant that antibodies were less able to bind to the virus’s spike protein in order to stop it from unlocking human cells to gain entry.”





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