If smallpox occurred in your community, about 30 percent of the people that acquire the disease would die from it.

如果天花发生在你的社区，大约百分之三十得了此病的人会因此死亡。

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The presence of lymphadenopathy can help identify the disease as monkeypox since it is not characteristic of either smallpox or chickenpox.

淋巴结病的出现可能有助于识别猴痘这种疾病，因为天花或者水痘都不具备这一特征。

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It was the next easiest disease to eradicate, but it was so much more complicated than smallpox.

它是下一个最容易根除的疾病，但它比天花要复杂的多。

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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

So if you got infected with smallpox, you got the disease.

如果你感染了天花病毒,就会得这种病

耶鲁公开课 - 生物医学工程探索课程节选

But variola, which causes smallpox in humans, and vaccinia, which causes a disease called cowpox in cattle, turned out to be, we now know, viruses that are molecularly very similar.

但是导致天花的人痘病毒,和导致牛痘,的牛痘病毒,后来发现其实是,我们现在知道,这两种病毒在分子水平上十分相似

耶鲁公开课 - 生物医学工程探索课程节选

Even regarding smallpox, a disease that is extinct but could be revived as a bioterror weapon, there is good news.

FORBES: Why Anthrax Is Less Scary Now

Like polio, smallpox was a viral disease for which effective, easily administered vaccines existed.

ECONOMIST: Can a businessmen��s club eradicate polio from the world?

Several years ago plans to destroy the remaining legal stocks of the virus that causes smallpox a disease supposedly now eradicated were dropped on advice from America's intelligence services, among others, that North Korea and other countries were secretly experimenting with the stuff.

ECONOMIST: Biological weapons