There is no vaccine available for herpes simplex virus to prevent it in patients. Herpes simplex virus is clinically classified into type I and type II. Herpes simplex virus type 1, which can cause herpes on the mouth, lips, face or body. In particular, the occurrence of herpes on the lips and mouth is very common in clinical practice, and many patients may inadvertently become infected with these viruses and recover on their own, for which vaccination is not required. In contrast, herpes simplex virus type 2, which can cause genital herpes in patients, genital herpes is a clearly infectious STD. Therefore, the main thing for patients who want to prevent genital herpes without a vaccine is to be clean and avoid high-risk sexual behavior.