蚊虫传染的病毒性脑炎 mosquito-borne viral encephalitides
动物有寄生虫或携带各种各样的病毒。一旦传染给人类，这将会是非常麻烦的事。
Animals have parasites or carry a variety of viruses. Once transmitted to humans, it would be a very troublesome thing.
此外，还有传染病和寄生虫影响认知能力的直接证据。
There is, moreover, direct evidence that infections and parasites affect cognition.
了解寄生虫是怎样跳种种障碍是了解传染性疾病是怎样在人类之间传播的关键所在——最近一个迁徙的例子也在这周公布了。
Understanding how parasites leap species barriers is crucial to understanding how new infectious diseases start in humans—and an example of a recent leap was also published this week.
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