In 1981, CDC received reports from Los Angles of five cases who had rare Kaposi carcinoma and severe immune suppression. These cases were thoroughly investigated because the disease clustered in a unique population—among those men who had sex with men. The initial interest was to examine whether the unusual sexual behavior was linked to this disease. It was suspected that a new infectious disease occurred. The virus was identified in 1986 by researchers in France and the US. Human immunodeficiency virus (HIV) and acquired immune deficiency syndrome (AIDS) have become common words since then.

Where did HIV come from? Any curious mind would ask but no one is able to answer. Most scholars now agree that this deadly virus was originated in Africa, presumably from the chimpanzees living in Cameron or Congo.
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