Scientists warn Covid vaccine won’t be a ‘silver bullet’ amid claims coronavirus is mutating – The National

British scientists have warned the country’s first coronavirus vaccine wont be the silver bullet that ends the pandemic and could only alleviate symptoms instead of giving full immunity.
Englands chief medical officer Chris Whitty said he believed the vaccine may only be effective 40 to 60 per cent of the time – similar to the flu jab.
University of Oxford scientists have set the vaccine a minimum effectiveness of 50 per cent, claiming a jab that could cut the pandemic in half would be hugely …

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