Many people consider HSV-1 more benign, but it turns out there’s not much difference between the two types of virus. Another 417 million people (11 percent) between ages 15 and 49 worldwide have herpes simplex virus type 2 (HSV-2).
According to the World Health Organization, 3.7 billion people under age 50 have herpes simplex virus type 1 (HSV-1) - that’s 67 percent of the global population in that age bracket. Shocked? You shouldn’t be, since the virus is very common. A surprising number of people you know probably have herpes.