HIV can not be transmitted or spread through saliva, according to the Centers for Disease Control and Prevention. The only way that an HIV-positive person can transmit HIV to another person through kissing is if both people have open sores in their mouths. This type of transmission is extremely rare.
Only certain types of bodily fluids are involved in the transmission of HIV, according to the Centers for Disease Control and Prevention. These bodily fluids include blood, semen, pre-seminal fluid, rectal fluids, vaginal fluids and breast milk. In the United States, HIV is spread mainly through anal and vaginal sex with an HIV-positive individual or sharing needles for IV-drug use with an HIV-positive individual.