Herpes is a viral infection caused by the virus Herpesviridae which infects humans. Producing or shedding of the virus by an infected person can cause it to spread.

Herpes simplex virus 1 and herpes simplex virus 2 (HSV-1 & HSV-2) are the two members of the Herpesviridae virus family that infects humans. It is also known as human herpes virus 1 and human herpes virus 2(HHV-1 & HHV-2). Both HSV-1 & HSV-2 are contagious and ubiquitous.