Medically reviewed by Anju Goel, MD Herpes simplex virus (HSV) is a common—and one of the most confusing—infections. Two ...

Genital herpes, usually the result of an infection with herpes simplex virus type 2 (HSV-2), is the most common cause of genital ulceration. The first clinical episode is called primary genital ...

and about one-fifth are positive for HSV-2. These two factors contribute to the risk for sexual transmission and therefore to the risk of late-pregnancy acquisition of HSV. Most neonatal herpes ...