Televangelist Pat Robertson on Thursday claimed that HIV/AIDS was caused by a World Health Organization (WHO) polio experiment gone awry.

The 700 Club host, who earlier told viewers that gay people in San Francisco were purposefully spreading HIV/AIDS with special rings, returned to the topic to discuss its origins.

“I think the World Health Organization was doing some experiment in the Congo on a monkey virus, a monkey injection to fight polio, and it wasn’t an injection, they put it in sugar cubes and they gave it to these Africans, a couple hundred thousand in the test,” Robertson said.

“This is the first time when monkey diseases crossed into the human condition and out of that has come this terrible thing. It seems to be transmitted so often through sexual contact and it was rife in the homosexual community but has then jumped into the heterosexual community,” he added. (The video is embedded on this page. Visit our video library for more videos.)

Citing several sources, Right Wing Watch, a project of People for the American Way, pointed out that the conspiracy theory has already been widely discredited.

“The charge that humans acquired HIV from these [polio] trials remains, for most experts, an empty accusation, made more improbable by recent studies that found no detectable traces of chimpanzee DNA in frozen stocks of [Hilary] Koprowski's vaccine. The results, said one group of researchers, 'should finally lay the OPV/AIDS theory to rest,” wrote David Oshinsky in Polio: An American Story.