Exposure to saliva will not transmit HIV.
Risk of getting HIV from incidental contact or exposure is minimal.
Hepatitis is a different story.
Usually treatment for suspected exposure to HIV is to start you on the AIDS cocktail, AZT-efavirenz, lamivudine and zidovudine for a six month period. This is followed by retesting for HIV.
All Police and EMTs should get innoculated for Hepatitis C.
I'm sorry, I was just imaging what you would look like with duct tape over your mouth