疫苗也可以通过提供取自动物或人身上的B细胞来发挥同样的作用，从而使我们获得被动免疫。
A vaccine may also give us passive immunity by providing B cells taken from an animal or a human to play the same role.
疫苗也可以通过提供取自动物或人身上的B细胞来发挥同样的作用，从而使我们获得被动免疫。
A vaccine may also give us passive immunity by providing B cells taken from an animal or a human to play the same role.
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