[WaxOff]

have they ever figured out what actually causes the infection? Not how it's spread, but how it's created?

For example, can two homosexual men that both test negative for it have all of the monogamous, unprotected sex they want without risk of infection? Can two intravenous drug users that both test negative share all of the needles they want, only between themselves, without the risk of infection?

Personally, I think the sooner they find, or at least admit (if you listen to some conspiracy theorists), they'd be a hell of a lot closer, if not complete in finding the cure.