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  1. Oxford Dictionary

    herd immunity

    • n.
      resistance to the spread of an infectious disease within a population that is based on pre-existing immunity of a high proportion of individuals as a result of previous infection or vaccination

    • noun: herd immunity, plural noun: herd immunities

    • 釋義

    名詞

    • 1. resistance to the spread of an infectious disease within a population that is based on pre-existing immunity of a high proportion of individuals as a result of previous infection or vaccination the level of vaccination needed to achieve herd immunity varies by disease