Two-thirds of the world population has herpes . More than 3 . 7 billion people under the age of 50 -- about 67 percent of the global population -- are infected with herpes simplex virus type 1 (HSV-1) and about 1-6 have (HSV-2) , according to a new report from the World Health Organization . Herpes is not life threatening an most people don’t experience any symptoms after their initial infection , if . . .