It can be transmitted by contact of mucosal surfaces where there is no break in the mucosal surface.
there is a small risk of spread by drinking from the same glass of a person with an active lesion on his/her lip.
Once infected, individuals harbor these viruses for the life-time.
In patients with intact immune function, they may appear as painful shallow ulcers that resolve without treatment, during periods of stress.
Commonly recognized as "cold sores" or "fever blisters'