There's no company that's making smallpox vaccine anymore because there's no reason to make smallpox vaccine, because nobody would buy it, right?
没有公司还生产天花疫苗,因为没有人购买天花疫苗,因此早就没有理由继续生产它了,对吧
Some, like the smallpox vaccine on one exposure generates a very high response that lasts for many years so you don't need a boost.
有一些疫苗,比如接触一次天花疫苗后,人体就能产生高水平的免疫应答,并持续很多年,所以无需再次接种
I think the smallpox vaccine we made now would probably be better, more effective, and safer than the vaccines we made in the '50s.
我相信若我们现在制造天花疫苗,应该会比五十年代的更有效更安全
So, none of you in this room, I'm 100% confident, never ever got a smallpox vaccine.
所以我百分百确信这间教室里所有人,没有一个人接种过天花疫苗
Remember that the lucky thing about the smallpox vaccine was that a naturally occurring attenuated form of the smallpox virus variola called vaccinea was found.
对于天花病毒来说,幸运的是,存在一种自然发生的,被称作痘苗病毒的,天花病毒的衰减疫苗
I also talked last time about smallpox and the perceived need to produce more smallpox vaccine in the event that smallpox is used as a weapon in 2002.
上次我也谈论过了天花,以及在二零零二年天花被当作武器使用时,制造出更多天花疫苗的必要性
We want to talk about that same concept today in terms of polio, which is a vaccine that is both made and manufactured in a different way than the smallpox vaccine.
今天我们以小儿麻痹症为例继续讨论疫苗,脊髓灰质炎疫苗的研制与,大规模生产方式同天花疫苗截然不同
We've talked about getting lucky, finding a naturally occurring attenuated live vaccine as in the case of smallpox.
我们谈到过,在天花病案中,我们发现自然弱化的活性疫苗,是多么的幸运
We started on this topic on Tuesday, particularly emphasizing smallpox and kind of the history of vaccine development.
我们在本周二,重点讨论了天花,以及疫苗的发展历史
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