About HIV Transmission. Infected person?

Only theoretically. HIV is primarily found in bodily fluids like blood, semen, vaginal secretions, sweat, saliva. The concentration of the virus however, varies. The most common modes of transmission are (in descending order of probability) are: 1. Exchange of blood 2. Exchange of semen/vaginal fluids The other fluids have concentrations so low, that the risk is only theoretical. Why I mentioned a theoretical risk is, if there was an exchange of blood through the glass (both users had chapped lips/ulcers/cuts on or in the mouth), while the virus was viable, and the concentration significant, and the transmission was blood to blood (saliva, and subsequently gastric acid kills the virus) transmission is possible. However, the chances of that happening, is extremely low. Also, for a transmission to happen through saliva would require an exchange of a bucket or two, at once! This again, is very improbable.

There's no cause to worry over it, however, to be absolutely certain, you may take a 4th generation HIV+p24 antigen test post 90 days of exposure.