You would have this initial response, now that initial response might be too slow to prevent you from getting chickenpox.

你对水痘病毒产生初始应答,这种初始应答可能,过于缓慢,无法预防水痘

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Just to say a little bit about smallpox, because unlike chickenpox, which if you haven't had, you've probably seen a case of it.

我们稍微说一下天花,因为它不像水痘那样,就算你没得过你也见过

耶鲁公开课 - 生物医学工程探索课程节选

Most recently, or more recently, there was a vaccine for varicella, which you know is chickenpox that was developed in the last ten years.

近期,或者更近一些,还出现了水痘疫苗,你们知道,就是近十年出现的水痘

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I didn't have the commercial price for the chickenpox vaccine called Varivax but you can imagine that it's even more than $50 a dose for that one.

我不知道水痘疫苗,伏痘敏的商业价格,但是你可以想象一下,这种疫苗每支的价格要超过五十美元

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Right, now are there people here that have not had chickenpox, right?

好,现在这里的人,有人没得过水痘,是吧

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Now, so there's probably a number of people in this room, so when I first started teaching this class 20 years ago, everybody in the room had had chickenpox.

现在,这间教室中的很多人也许,在二十年前,我第一次教这门课的时候,当时教室里的每个人都得过水痘

耶鲁公开课 - 生物医学工程探索课程节选

Yeah, so for example, you get exposed to-- before there was a vaccine your brother or sister had chickenpox, and so you got exposed to chickenpox naturally through your contact with them.

举个例子来说,如果你生活在这样的环境里,兄弟姐妹们还没接种疫苗就得了水痘,而你通过与他们相接触,在自然情况下接触到了水痘病毒

耶鲁公开课 - 生物医学工程探索课程节选