If partners also use condoms and antiviral medications: Transmission is easier from a man to a woman. Using condoms is very important. I've only had one outbreak, as far as i know, and the only symptom that i can recall was an incredibly bad pain in my lower back, which my doctor seemed to think did not suggest herpes. Cold sores contain high concentrations of the virus and hence increase the chances of transmission significantly.
Not to say it can't occur, but it doesn't seem a realistic concern. Using condoms is very important. Cold sores contain high concentrations of the virus and hence increase the chances of transmission significantly. Specifically receiving oral, no vaginal sex. 4% chance transmission from female to male; Very low but not zero If partners also use condoms and antiviral medications: 4% per year male to female;