时差N小时 疫苗的神奇作用(上)（在线收听）

When a virus enters your body, your body has to recognize it, then produce a protein called an antibody.

当病毒进入你的身体,你的身体会进行识别,然后产生一种被称为抗体的蛋白质。

These antibodies attach to the virus and neutralize it; however, in the time it takes your body to produce enough antibodies,

这些抗体会附着在病毒上然后进行中和;然而这段时间内你的身体会产生足够的抗体,

the virus may have already multiplied enough to make you sick.

而病毒的数量可能已增加到足以使你生病。

Here's the good news once your body has learned to make the right antibodies, it can make them much faster, neutralizing the virus before you get sick.

好消息是一旦你的身体已经学会产生正确的抗体,就会使它们加速产生, 在你生病前将病毒中和。

Vaccines teach your body to recognize and react to a virus quickly.

疫苗教给你的身体迅速识别并且对病毒做出反应。

There are two types of vaccines you can get to teach your body to recognize a virus.

有两种类型的疫苗可以教给你的身体识别病毒。

In activated vaccines contain a dead virus, which cannot infect your cells, but your body recognizes it as a virus and produces antibodies to neutralize it.

灭活疫苗中含有一种死亡病毒,不会感染你的细胞,但你的身体会意识到这是一种病毒然后产生中和抗体。

The vaccines for polio and the seasonal flu use dead viruses.

脊髓灰质炎及季节性流感疫苗就是使用已经死亡的病毒。