艾滋病病毒的灵长类动物版本被称为猴免疫缺陷病毒（SIV），但大多数感染此病毒的猿猴并没有显示任何疾病症状。

The primate version of the virus that causes AIDS is called simian immunodeficiency virus (SIV), but most apes and monkeys that are infected with it show no symptoms of illness.

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艾滋病被认为起源于非洲，那里的黑猩猩和猿携带了一种类似HIV的病毒，叫SIV(猴免疫缺陷病毒)。

AIDS is thought to have originated in Africa, where monkeys and apes harbor a virus similar to HIV called SIV (simian immunodeficiency virus).

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许多科学家认为，导致艾滋病的病毒来自非洲的青猴。

Many scientists think, the virus which causes AIDS did jump from the African Green Monkey.

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