He took this pustular fluid that was produced at this very specific phase of the disease, and he developed a way for giving that to people.

他取出脓包中的,由这种,非常特殊的过程产生的液体,他还发明了一种将之接种到人身上的方法

耶鲁公开课 - 生物医学工程探索课程节选

And I've already given you some clues about this, in that this process of vaccination that Jenner had developed was intentionally injecting into healthy patients, a microorganism.

我刚刚已经向你们提示了一些,在詹纳发明的接种过程里,故意把微生物注射到健康病人身上

耶鲁公开课 - 生物医学工程探索课程节选