Hi there...Ideally one should not get
hiv virus or other stds when they have sexual intercourse with a condom. But due to any condom breakage or slipping, if any mucosal surface( genital, oral, anal) of one individual, comes in contact with any body fluids (like blood, vaginal secretions, semen, saliva) from the positive person, then there is chance of transmission of hiv virus or any other stds. So always be safe.