Herpes Simplex Causes. Herpes simplex virus type 1 and type 2 cause lifelong oral and genital herpes infections. Herpes infections are caused by herpes simplex virus (hsv) types 1 and 2.

Herpes infections are caused by herpes simplex virus (hsv) types 1 and 2. The causes of the infection are due to many factors such as: Overview of viral infections a virus is composed of nucleic acid, either dna or rna, surrounded by a.