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Covid vaccines: what are the implications of new variants of virus? – The Guardian
UK, South Africa and Brazil variants indicate changes may be needed
In common with others, the virus that causes Covid-19 mutates as it spreads. Most mutations have little or no effect, but some can change the behaviour of the virus. Mutations in a variant found in the UK in September has helped the virus spread more easily and potentially more dangerously. Further changes in variants that emerged in South Africa and Brazil may help the virus resist antibodies induced by vaccines and Covid infections from the first wave.
Why would the vaccines be updated?If scientists…
