Expert: Kristen Brannock, MPH - 9/5/2007

Question
if protected oral sex performed,(blowjob)[from subject A to subject B where subject B is the reciever and A is insertive.]and if subject A has some broken skin or abrasions due to scratching around the testes and groin and if subject B licks the skin JUST ONCE, what are the risk possibilities?... and also what are the possibilities if subject B has anykind or sores etc due to bad dental hygiene..what is the percentage of risk involved.?

I know that saliva does not transmit HIV but just what is the amount of blood needed in a persons mouth to actually transmit the virus..or does saliva have the property of taking care of little or negligible blood present in mouth.

Answer
Saliva does not "kill" any virus that is contained in blood. Blood coming from the mouth can transmit HIV.

Anytime that infected blood, semen, vaginal fluid and/or breast milk enter another person's body, transmission is possible.

There is no way I can give a percentage of risk.