在病毒传播广泛的地区，大多数甲型肝炎感染发生在儿童早期。

In areas where the virus is widespread, most HAV infections occur during early childhood.

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答：昏睡病也称为“非洲人类锥虫病”，是一种传播广泛的热带病，如不给予治疗，则可能造成死亡。

A: Sleeping sickness, also called "human African trypanosomiasis", is a widespread tropical disease that can be fatal if not treated.

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与传播广泛的HIV-1 M株、以及更罕见的从人类转移至黑猩猩的N和O株不同的是，这一新发现的P株源自大猩猩。

Unlike the widespread HIV-1 M strain, and the much rarer N and O strains, which jumped to people from chimpanzees, the newly described P strain originated in gorillas.

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