A member asked:

If hiv existed before 1981, why didn't it spread before that year?

A doctor has provided 1 answer
Dr. Yvette Kratzberg answered

Specializes in Pediatrics

The origins of HIV in humans are thought to have come from non human primates in central/west Africa. Until 1981 there was not a subtype that could infect humans.

Answered 9/21/2021

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