I'm sure the virus was picked up through monkey bites.
Or, what about butchering? That would be rather bloody, and if you had an opening in the skin....is that not possible?
susie
You mean monkey butts, not bites! I knew I'd find you on a caca thread, Pissy. You're our resident expert in this area! :P
It would be simple enough to have spread through an abrasion on the hands or arms of a person who butchered one of the infected chimps.