Final answer:
Herpes simplex virus type 2 is the most common causative agent of genital herpes.
Step-by-step explanation:
Herpes simplex virus type 2 is the most common causative agent of genital herpes. Genital herpes is a viral STI caused by a herpes simplex virus. The cause of genital herpes is most often herpes simplex virus type 2 (HSV-2). HSV-2 infection is more common in women than men. It can be transmitted through sexual contact, even when there are no visible sores.