A new strain of HIV has come from gorillas: “New Strain of H.I.V. Is Discovered”
All three other known strains of the human immunodeficiency virus, H.I.V.-1, have been linked to chimpanzees. But genetic tests showed that the new virus was closely related to a recently recognized gorilla virus.
The most likely explanation for the new viruss emergence is gorilla-to-human transmission, probably a result of humans slaughtering apes or handling or eating their meat.