In particular, we're going to focus in the beginning, on polio virus, which is another great success story, but where a very different approach to vaccine development was used.

特别地,在开始我们会关注脊髓灰质炎病毒,那是又一个成功的故事,但又与发现疫苗的过程不尽相同

耶鲁公开课 - 生物医学工程探索课程节选