And so even people that got vaccinated, most of us either have questionable or no protection against the virus at this point.

所以就算那些接种过天花疫苗的人,到那时候也不一定,或者压根无法抵御病毒

耶鲁公开课 - 生物医学工程探索课程节选

One was, a better understanding of what you were doing when you vaccinated.

一是更好的理解了,当你接种时究竟发生了什么

耶鲁公开课 - 生物医学工程探索课程节选

And you've all been vaccinated, I would guess, for hepatitis B.

我猜,你们都接种过乙肝疫苗了

耶鲁公开课 - 生物医学工程探索课程节选

In addition, even people-- I got vaccinated 40 years ago,right?

此外,即便是像我这样的人,接种天花已经四十年了

耶鲁公开课 - 生物医学工程探索课程节选

So you need hundreds of millions of doses, at least, and you need a way to distribute that around the world, and you need a way to keep track of who got sick and who didn't after they got vaccinated.

至少需要上亿支的剂量,还得有办法将疫苗运送到世界各地,你还要一种方法进行跟踪,在接种疫苗之后谁得病了和谁没得病

耶鲁公开课 - 生物医学工程探索课程节选