How likely is someone to catch genital herpes if exposed only one time?

It is very possible. I got genital herpes over 5 years from a guy I had slept with ONE time.

Genital herpes is spread very easily, even if there are no physical symptoms of the virus present, like sores. According to Valtrex, 70% of people with genital herpes got it from their partner when they had no signs or symptoms of the virus, like sores. Source(s): Personal experience. I have had genital herpes for over 5 years.

It is still very possible. Very little exposure is needed to contract any STD or HIV. I HOPE YOU ARE OK. Get checked ASAP!
It is extremely likely you will get herpes if you were exposed to the sores, even if it was only for a second and only one time. If you do wind up getting it, remember that it isn't the end of the world. You should always use condoms to minimize your risk from all STD's especially HIV. But also remember that condoms don't protect you 100%. Good luck.
Very likely. If you come in contact with the infected area, you will get it. It is not a deadly condition, but it is there for life.
it is very unlikely that you will catch it. what are you worried about anyway? it's like having a cold sore
the number of times you've been exposed is not the point, you can get any STD from any exposure.