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.
一些其他类型的免疫缺陷病毒可以影响猫和其他灵长类动物，即猫科类免疫缺陷病毒(fip)和猿猴免疫缺损病毒(SIV)。
There are some other types of immunodeficiency viruses that specifically affect cats and other primates, namely the Feline immunodeficiency virus (FIV) and Simian immunodeficiency virus (SIV).
该病毒的猴版——猴免疫缺陷病毒（SIV）对猿猴所引起的感染大为温和。
The simian version of the virus causes a much milder infection in apes and monkeys. Photograph: Corbis
新英格兰区灵长类研究中心的戴斯罗士已经证明，从SIV中除去“否因”基因后，病毒就无法使猿猴发病。
Ronald Desrosiers at the New England Regional Primate Re-search Center has demonstrated that when the nef gene is removed from SIV, the virus no longer has the power to make monkeys sick.
新英格兰区灵长类研究中心的戴斯罗士已经证明，从SIV中除去“否因”基因后，病毒就无法使猿猴发病。
Ronald Desrosiers at the New England Regional Primate Re-search Center has demonstrated that when the nef gene is removed from SIV, the virus no longer has the power to make monkeys sick.
应用推荐