What are the chances to have unprotected sex having herpes and not spread the virus if i am not having any symptoms (blisters) of the disease?

Asymptomatic Shed: Asymptomatic shedding is very real and one of the biggest reasons why it's possible for people with herpes to pass herpes virus on to a sexual partner without having any signs or symptoms. That's pretty much what asymptomatic means: you can't see or feel that the virus is present and active on the surface of the skin. 70% of herpes is spread by asymptomatic shedding of the virus.