Herpes, is really not that much of a problem, if you show no symptoms.
The infected cells are dormant and can't spread the disease.
Once your imune system is down.. During a flu for example, there can be small bubbles around your lips. Then you have to be very cautios and never touch these with your hands or you will smear the disease to other body parts. You can treate the bubbles with certain salves and once they are gone, you are no longer infectios.
The disease stays in your body though and once your imune system is down again, the bubbles will return...