Origin Of AIDS
AIDS is caused by the human immunodeficiency virus (HIV), which originated in non-human primates in Sub-Saharan Africa and was transferred to humans during the late 19th or early 20th century.
Two types of HIV infect humans: HIV-1 and HIV-2. HIV-1 is more virulent, is more easily transmitted and is the cause of the vast majority of HIV infections globally. The pandemic strain of HIV-1 is closely related to a virus found in the chimpanzees of the subspecies Pan troglodytes troglodytes, which lives in the forests of the Central African nations of Cameroon, Equatorial Guinea, Gabon, Republic of Congo (or Congo-Brazzaville), and Central African Republic. HIV-2 is less transmittable and is largely confined to West Africa, along with its closest relative, a virus of the sooty mangabey (Cercocebus atys atys), an Old World monkey inhabiting southern Senegal, Guinea-Bissau, Guinea, Sierra Leone, Liberia, and western Ivory Coast.
Read more about Origin Of AIDS: Transmission From Non-humans To Humans, Pathogenicity of SIV in Non-human Primates, Classification, Genetic Studies, Discredited Hypotheses
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—Amanda Heggs, British AIDS sufferer. Quoted in Guardian (London, June 12, 1989)