Is it possible to get cold sores when there is no lesion?

Hello! My girlfriend has oral herpes. I wonder if it is possible that I get infected by the disease even after the period of mouth sores is over. Thank you, Luis!
Expert answer:

In theory not. Herpes is only contagious in the presence of lesions, but lesions are not always as clear and small lesions can be confused with other lesions.

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