Conspiracy Theory: Origin of aids

I recently was reading an interesting theory which concludes that the medical tests done by a team of scientists could be resonsible for the AIDS Virus.
They say that the Chat strain of Oral Polio Virus developed by Hilary Koprowski in 1957 used kidneys of live chimpanzees and was administered to millions in Congo. They claim that this could be the point where the cross-over from chimpanzees to humans took over.