Britain's chief scientific adviser said on Saturday that Covid-19 vaccines appeared to be adequate in generating an immune response to a new, more transmissible variant of the coronavirus.
Patrick Vallance also told reporters that more public health measures were needed to keep the new variant under control.
He was speaking shortly after Prime Minister Boris Johnson announced tougher coronavirus restrictions for London and the south-east of England.
(Published 19 December 2020, 17:06 IST)
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