A member asked:

How was aids started? who spread it? how it came to human beings?

A doctor has provided 1 answer

...: It is thought that chimpanzees in west africa were the source of HIV and that simian immunodeficiency virus (siv) was transmitted to humans via blood exposure while hunting the chimpanzees. The earliest known case of HIV was documented from a 1959 blood sample of a man from democratic republic of the congo.

Answered 6/10/2014

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