A Claim of Herd Immunity Reignites Debate Over U.K. Covid Policy

Neil Ferguson, a leading epidemiologist, said the country had almost reached a state of herd immunity as it settled into a new normal of about 40,000 cases a day. Other experts disagreed.,Neil Ferguson, a leading epidemiologist, said the country had almost reached a state of herd immunity as it settled into a new normal of about 40,000 cases a day. Other experts disagreed.

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