这样的案例表明,即使是通常不致命的疾病,当它们袭击一个免疫防御能力不强的社区时,也会造成毁灭性的后果。
Cases such as this demonstrate that even diseases that are not normally fatal can have devastating consequences when they strike an immunologically defenseless community.
人们接种疫苗抵抗猪流感比任何人挑战希望容易得多,根据目前情况,人们对现在席卷全球的大流行有意想不到的一定程度的免疫性。
VACCINATING people against swine flu may be a lot easier than anyone dared hope, as it turns out that people have an unexpected degree of immunity to the pandemic now sweeping the world.
然而,感染还能触发另一种反应叫细胞介导免疫性,某些白细胞靶和破坏感染的细胞。
However, infections also trigger another reaction called cell-mediated immunity, in which certain white blood cells target and destroy infected cells.
There are two types of adaptive immune responses and they're called humoral immune responses.
获得性免疫反应有两类,一种是体液免疫反应
The other part of the adaptive immune system is the cell mediated immune system and this is an immune where that doesn't involve antibodies but involves cells that are activated in response to a foreign antigen and that utilize cellular means to get rid of it.
获得性免疫系统还包括,细胞免疫,这一免疫反应不包含抗体,但包含可以被激活来应答,并清除外源抗原的免疫细胞
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