These proteins are called antibodies. They are produced by the immune system when 'foreign / non-self' substances are detected in the body.
There are two types of the herpes simplex virus.
HSV-1 aka oral herpes. This type can cause cold sores and fever blisters around the mouth and on the face.
and
HSV-2 this type is generally responsible for genital herpes outbreaks.
I Hope This Helped!