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England’s health secretary, Matt Hancock, has told parliament that a new variant of covid-19 has been identified and may be driving infections in the south east, leading to headlines about “mutant covid.” Jacqui Wise answers some common questions

The mutation E484K, first identified in the South African SARS-CoV-2 variant, has now been identified in the UK fast-spreading variant, prompting fears the virus is evolving further and could become resistant to vaccines. Jacqui Wise looks at what we know so far

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