How many times after having unprotected sex with an hiv positive male that does not know they have hiv, can a female get infected by the virus? and how many months/years/days can a female have unprotected sex with an hiv pos. male until she gets it?

HIV from sex: Heterosexual vaginal receptive intercourse is associated with the risk of 0.07-0.08 per vaginal sex. It means 7-8 cases of transmission for every 10,000 acts of unprotected sec with hiv positive male. These are the average risk but some factors may increase the risk such as: presence of another STD, any skin break down in genius area or during menstruation. Please get tested and use protection.

HIV: Males and females could transmit HIV to one another. It doesn't work like that. You can't feel safe having unprotected sex a number of times before your risk goes up. You are at risk every time you have unprotected sex if the other person is infected.