Herpes is very common: roughly 50–80% of U.S. adults have oral herpes (HSV-1), and about 1 in 6 people ages 14–49 in the U.S. have genital herpes. Globally, WHO estimates that over 1 in 5 adults aged 15–49 live with genital herpes infection.

What that means

  • Oral herpes is usually HSV-1 and often shows up as cold sores or fever blisters around the mouth.
  • Genital herpes can be caused by HSV-1 or HSV-2, and many people never notice symptoms.
  • Because it often goes undiagnosed, the actual number of people who carry herpes is likely higher than the number of diagnosed cases.

Simple takeaway

Herpes is far more common than many people think , and having it is not unusual. It is a lifelong viral infection, but treatment can reduce symptoms and outbreaks.

Quick note

If this question is about symptoms, testing, or how herpes spreads, I can give a plain-language breakdown next.