That’s 3.7 billion people worldwide who are infected. We used to call them cold sores or fever blisters and dismiss them as unsightly and annoying.
It used to be thought that HSV-1 caused all infections above the waist and HSV-2 was responsible for those below.
While it is more common for HSV-1 to infect the mouth and HSV-2 the genitals, we know now that either strain of the virus can cause infection in either place.
Herpes is spread when cells from infected skin come in contact with either broken skin (like a cut or a sore) or mucous membranes such as the lips or genitals.
So Many People Have It One thing that makes herpes infections so common is that it can be spread whenever the virus is shedding, which can happen when people are not experiencing any symptoms.
Some people find that they have repeat infections in moments when they are run-down or stressed out.