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AIDS - The origin of the virus

What was actually AIDS - or the HIV virus?

There are to different sources and investigations.

succeeded in May 2005 an international research team for the first time, proof that the origin of HIV is the monkey. The research team took to the wilds of Central Africa Cameroon 446 faecal samples of wild chimpanzees. Some samples had antibodies to simian immunodeficiency virus (SIV short;. Engl Simian Immunodeficiency Virus) that chimpanzee version of the HI-virus, as the team in the U.S. journal Science published. Twelve samples were almost identical to the HIV-1 in humans. The team emphasized that the antibodies were previously found only in chimpanzees in captivity. Original source of the HIV virus, the chimpanzee does not. They should have been infected in western Central Africa with SIV or a precursor of this virus in other primates. Around the 20th Century infected the first time people with the SIV, then the mutant organisms in which the AIDS-causing HIV. This has the AIDS virus for at least twice skipped the species barrier, namely, from ape to ape, and then to humans. As the virus to humans was transmitted is unclear. It is believed that hunters who hunt and eat monkeys have been infected with the virus for the first time.

Another theory was that a vaccine against poliomyelitis (polio) in 1959 by monkeys who carried the virus had been contaminated. After the thesis was in the former Belgian Congo chimpanzee kidneys used for propagation of the vaccine and then hundreds of thousands of people vaccinated by oral vaccination, which SIV was transmitted to humans and was mutated to HIV. However, an analysis of mutations that can be dated with a 95 percent chance that the source of the strain HIV-1 before the year 1930. In February 2000, a sample displayed the distributed polio vaccine and tested. This showed no traces of HIV or SIV.

The oldest dates on samples of blood secured evidence of HIV infection in Zaire in 1959. Around 1966 to the virus to Haiti and from there in 1969 have arrived in the United States. Recent studies have concluded that the HIV virus has already infected about 1908 for the first time a person is to limit where the light of recent statistical analysis (so-called molecular clock) the time window for the first occurrence of a high probability to the years 1902-1921 can.

Source: http://de.wikipedia.org/wiki/Humanes_Immundefizienz-Virus

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