On December 1, 1981, the AIDS virus is officially recognized as a disease. Aids is a disease of the human immune system caused by infection with human immunodeficiency virus (HIV).

The complete origin of HIV are not really known to researchers on this day. Clear is however, that the human immunodeficiency virus is very similar to the Simian immunodeficiency virus (SIV), a retrovirus that is able to infect over 40 species of African primates. It is assumed, that this virus exists for more than 32.000 years, which was measured at the African island Bioko and the African mainland....