We'll I doubt it will become air born, it does mutate however, the sequence of protiens in the lipid bilayer surrounding the virus change and mutate and as a result of this diversity of HIV strains makes developing a vaccine very difficult.

It could actually have been possible for the government to have created the AIDS virus, but I don't know if I believe that because the U.S. government would never kill their own civilians. If you ask me AIDS is a product of to much 1980's queer buttsex with multiple partners.

I myself don't get anal, even with hot women.