So I'm about to go on vacation with my girl next week and she gets a goddamn cold sore right before the trip. I did some research and apparently its caused by the HSV-1 herpes virus, they're contagious as hell and can spread to unwanted areas. However, most people are presumed to already have it but the symptoms don't appear in everyone. To those of you who are more knowledgeable on this topic, is this no big deal or should I treat her like she has the bubonic plague and cancel the trip? I'd imagine after a sex marathon the virus would be guaranteed to transfer to me if I don't already have it.