来自《耶鲁大学开放课程：生物医学工程探索第10集第10集》

Let's talk about the polio virus vaccine,

以脊髓灰质炎病毒疫苗为例
keeping those things in mind.

你们要记住这些知识点
Polio was--is a crippling disease.

脊髓灰质炎是一种致残性疾病
In many cases,

在很多情况下
it affects--it also initiates its infection through the gut.

它也同样是一种经消化道感染病毒
It can be passed from one person to another orally

可以通过口腔传播途径在人与人之间传播
and infects first cells of your intestinal system

它首先感染肠道系统的细胞
and then spreads to other cells,

之后再感染其他系统的细胞
in particular, spreads to cells

尤其是当病毒感染到
that are involved in the neuro muscular junction

那些构成神经肌肉连接的细胞
and can affect then muscle activity

就会影响到肌肉活动
or your ability to move voluntary muscles.

或者说骨骼肌的运动