这个趋势跟传染人类的疟疾寄生虫无关。

Such trends may not have any relevance to the malaria parasites that infect humans.

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首次发现直接由禽类传染人类的流感病毒，此病毒的传染与接触家禽市场有关。

The first time an influenza virus was found to be transmitted directly from birds to people, with infections linked to exposure to poultry markets.

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即使我们能够避免禽流感造成的灾难，我们目前也还面临许多其它跨国境和能够传染人类的动物疾病。

Even if we manage to dodge the bullet with avian flu, there are a lot of other animal diseases which are crossing the boundary and infecting human.

youdao

Okay, so let's talk about the example of smallpox, which is one of the world's great successes in the battle against infectious diseases.

我们现在来谈一谈天花,它是人类与传染病的斗争中,获得的一项伟大胜利

耶鲁公开课 - 生物医学工程探索课程节选