The success of any given vaccine depends on so-called herd immunity, in which a high rate of immunization in a population helps to protect those individuals who are not immune.
任何特定疫苗的成功都依赖于所谓的免疫屏障，即通过高比率的免疫人群来保护不免疫的个体。
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The worst cases involve extensive lung damage, possibly as the result of an excessive immune response among the most robust segment of the population.
最糟糕的病例包括大面积的肺损伤，可能是由于这个最强健群体存在过度的免疫反应所导致的。
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09052823】 Thank parasites for making some of our immune proteins into the inflammatory defenders they are today, according to a population genetics study in the Journal of Experimental Medicine.