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6. Is there strong evidence for the directionality of spread of HIV to human from non-human primates infected with SIV? Is it

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Simian immunodeficiency virus is a retrovirus that causes infections in non human primates.Siv's Sooty mangabeys and chimpanzees have crossed species barrier and entered humans resulting in HIV-2 and HIV-1 respectively, the two immunodeficiency viruses.The common route of transmission of HIV 1 virus is through the contact of contaminated blood of chimpanzees during hunting.

Yes humans can spread HIV to the primates but they dont get the AIDS.This scenario is less likely to possible because HIV Is sexually transmited disease and in very cases it is rare.The contaminated injections are given to the primates is very rare.Mostly the mose of transmission is very rare between humans to primates.

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