"It just is not a good idea." Swine flu parties are the latest version of chickenpox parties, where parents encourage their kids to share lollipops, spoons or whistles to spread the disease and get immunity.

VOA: standard.2009.12.18

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

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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