According to the authoritative British science and technology magazine "New Scientist", the research team from the National Department of HIV Evolution of Nottingham University found that the members of complex and diverse virus families are not more extensive than viruses with the same origin, because their genetic maps have many mismatches. Further research found that simian immunodeficiency virus (SIV), which eventually evolved into HIV, has the genetic characteristics of two simian viruses. At present, monkeys carrying this virus are mangabey with red top and spotted-nosed monkeys from Africa.
The above two monkey viruses eventually evolved into HIV through the exchange of genetic material and gene recombination. However, this genetic mutation process did not occur in monkeys, but in chimpanzees who preyed on monkeys, about 654.38 billion years ago, so chimpanzees were the earliest animals infected with AIDS in the world.