So, some of these cases were probably due to polio that was transmitted by incompletely killed virus that was present in the vaccine.

因此,那些病例的发病的原因,是被那些疫苗中携带的,没有被完全杀死的病毒感染

耶鲁公开课 - 生物医学工程探索课程节选

You've got to think about that and what it means and how were they transmitted and preserved without ; the means of technology, obviously, that we have today; and what was so exciting in the middle of the twentieth century was the discovery of the Dead Sea Scrolls.I'm sure that you've heard of them.

你们需要考虑到这点及这意味着什么,还有在没有当今我们所拥有的技术的年代,是如何传播和留传下来的;,在20世纪中期时最令人兴奋的就是发现了,死海古卷，我确定你们曾经听说过。

耶鲁公开课 - 旧约导论课程节选

None of these do we have vaccines for, and it's turned out that sexually transmitted diseases for a variety of reasons, we'll come back to later, are particularly difficult to develop vaccines for.

这些病我们都没有疫苗,已经证明,对于性传播疾病,有很多原因使得,我们稍后回来再讲,针对这类疾病的疫苗特别难做出来

耶鲁公开课 - 生物医学工程探索课程节选