I am reading the OP a little differently. I’m understanding the question as “Does a positive antibody test = EXPOSURE or INFECTION, and if EXPOSURE, do you have herpes and therefore can transmit it?”
I was told by my doctor years ago that I was positive for herpes-1 antibodies, “Like everyone else,” as he put it, but he stated that since I’d never had any evidence of infection I was probably exposed but not infected.
Someone I’m close to recently was infected with herpes-2. She had a new sexual partner and had had a previous negative herpes antibody test in the recent past. In fact, even with the outbreak, she was still testing negative, causing her doctor to say “Come back for another antibody test that will be positive in about 6 weeks.” This seems like pretty good reason for her gentleman friend to be tested. However, several doctors and the state board of health refused to test him if he wasn’t having an outbreak, even when his girlfriend called the state to explain the situation. This blows me away.