Legislation introduced by Senator William Fulbright established the program after World War Two.

VOA: special.2009.02.12

Well, this shows what happened in the period after this vaccine was introduced into the general population so that would have been in 1954.

这表明了,疫苗在一九五四年,引入大众后的一段时间内,发生了什么样的情况

耶鲁公开课 - 生物医学工程探索课程节选

The question is "What happens after a vaccine is introduced into the body?"

问题在于,人体在接种疫苗后会发生什么样的变化

耶鲁公开课 - 生物医学工程探索课程节选

After the clinical trial it was rapidly introduced into the population.

临床试验结束后,该疫苗迅速地应用于大众

耶鲁公开课 - 生物医学工程探索课程节选

Here, I've just picked a couple of the pictures that I showed you last time when we were talking about cell communication in the immune system, What happens after the vaccine is introduced into your body is that it initiates cellular events.

我挑选了,我上次给你们展示的几幅图片,当我们讨论到,免疫系统中的细胞沟通时,讲到过当人体接种疫苗之后,能够触发,细胞活动

耶鲁公开课 - 生物医学工程探索课程节选