One can stop spread of disease through a community without being 100% effective in each person who gets the vaccine.

疫苗能够遏制疾病在整个社区中传播,虽然对于每个人来说它并非百分之百有效

耶鲁公开课 - 生物医学工程探索课程节选

So you may want to spread happiness, through your word.

你也许想传播快乐，通过你的言话。

哈佛公开课 - 幸福课课程节选

It's an infectious disease; it is spread by--through the air.

它是一种传染病,通过空气传播

耶鲁公开课 - 生物医学工程探索课程节选

But in any event, the vaccine is intended to stimulate the immune system to produce an effector response— either antibodies or specific cells— that can combat spread of the microorganism through your body.

但无论如何,疫苗是通过,刺激免疫系统来使身体产生应答,无论是抗体还是特定的细胞,都可以阻止微生物在体内扩散

耶鲁公开课 - 生物医学工程探索课程节选

But what if instead of taking the fluid from a cow, I inoculated--he inoculated me, let's say, and waited until I had the lesion at the right stage, then took some of my fluid and gave it to Brian and Nate and Mirtalla and spread it through the community around me.

但假如不从奶牛那儿取得脓液,假设说是从他那里接种,等到病变程度合适,然后把我的脓液给,布莱恩和纳特还有米特拉,并在我身边的人们之间传播

耶鲁公开课 - 生物医学工程探索课程节选