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), according to a new report from the World Health Organization.
Herpes simplex virus is categorized into 2 types, both of which are highly infectious and incurable. HSV-1 causes lesions on the lips or around the mouth commonly referred to as cold sores or fever blisters. It’s primarily transmitted by oral-to-oral contact.
Read more on this in the source site, after the first two paragraphs. Click.. here.
Source Credits: Ashley Welch in CBS News