I'm a 25 year old male.
I posted in the STI group with regards to being urinated on by a woman. Basically two weeks ago, I was urinated on the face by a woman of unknown status. I can saw for sure that drops of urine got into my eyes nose and mouth. After peeing, she also rubbed her vagina on my shirt and then on my mouth/nose. There was no visible blood, but I don't know how to differentiate between "vaginal fluid" and pee as I am a man.
From everything that I heard of, the chances of HIV are quite low. However, to be extra safe, I was wondering, how much of the HIV virus is needed to infect someone? Also do the viral particles need to enter the bloodstream, or can I be infected by simply having any amount of hiv positive fluid sitting in my mouth for a while? I know some diseases just need a very small microscopic amount to cause an infection, while for others it's different.