Delta ‘blunts jabs’ effectiveness’, casts doubt on herd immunity and could see hoarding

Some vaccines lost effectiveness after three months, which is likely to lead to calls for booster shots

19 August 2021 - 19:56 By Naomi Kresge

Covid-19 vaccines are less effective against the Delta variant, according to results in the UK from one of the largest real-world studies into the efficacy of the shots...

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