Herpes is a disease caused by the
herpes simplex virus (HSV), of which there are two types. Type 1 (
HSV-1) usually causes oral herpes, an infection of the lips and mouth. Symptoms are commonly known as cold sores or fever blisters.In most cases,
genital herpes is caused by the second type of herpes virus (
HSV-2).
HSV-1 is usually passed from person to person by kissing. HSV-1 can also spread from the mouth to the genitals during
oral sex (fellatio, cunnilingus, analingus). If this happens, it becomes a case of genital herpes.
HSV-2 is most often passed by vaginal sex and anal sex. But just as HSV-1 can infect the genitals and cause genital herpes, HSV-2 can pass from one person's genitals to another person's mouth, resulting in oral herpes.
HSV-2 cannot survive long on a non-living surface, so there is no real risk of getting it from a toilet seat or hot tub, for example.
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