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.

• 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。