免疫逃避是指宿主(尤其是人類)的免疫系統無法對病原體作出反應,即宿主的免疫系統不再能夠識別和消滅病原體(例如病毒)。[1]不同的抗原能夠通過不同的機制讓宿主的免疫系統失效。例如非洲錐蟲能夠直接消滅宿主的抗體。 [2]百日咳桿菌通過抑制中性粒細胞和巨噬細胞來阻止免疫系統作出反應。 [3]
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