In particular, dairy maids, whose responsibility was to milk cows, and so they had a very intimate relationship with cattle, often didn't get smallpox.

特别是挤奶女工，她们的职责就是挤奶，因此她们与牛有着非常亲密的关系，通常不会得天花。

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Something like smallpox is hard to get, but there are other organisms that could become harmful.

像天花这种东西很难得到但是其他的有机体也可能会变得很危险。

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And Jenner made the observation that others had made, that people that were around cows a lot tended not to get smallpox.

詹纳观察到的现象别人也曾观察到,就是经常接触奶牛的人不容易患天花

耶鲁公开课 - 生物医学工程探索课程节选

And he started with a similar but different observation, and that was that cows get a disease that's very similar to smallpox.

他首先观察到一种类似但不同的情况,就是牛得了一种很像天花的病

耶鲁公开课 - 生物医学工程探索课程节选

Then you start to get lesions on your skin that are very characteristic of smallpox.

然后你的皮肤就会遭到损害,这就是天花的典型特征

耶鲁公开课 - 生物医学工程探索课程节选

The new drug is the best evidence yet that biotech companies are likely to be drawn into the fight against bioterror, thanks to stripped-down U.S. regulations that make it easier to get drugs approved to treat diseases like anthrax and smallpox.

FORBES: Genomics Pioneer Takes On Anthrax

Yet keeping the smallpox around dramatically increases the risk that a deranged person will get his hands on it and release it in the population.

FORBES: It's time to destroy the U.S. smallpox reserves