its very interesting one.
one thing in HIV
is there -it spread from contact also but only when there is break in skin both side.or blood contact to broken skin.
after waxing skin damage is there.
skin become open due to loss of hair.
so after wax if u r coming in direct contact with HIV positive person whose skin is also damage,or with his blood or semen ,only then minor chance of getting infection is there,
after wax it need 7-10 day to recover.
this is my opinion and i am sure i am not wrong.