Definition of Herpesvirus

Herpesvirus: One of a family of viruses that contain DNA and that cause infections in humans (human herpesviruses) or animals. Herpesviruses are common and often live in the host's tissue for years or even decades without causing symptoms.

Source: MedTerms™ Medical Dictionary
http://www.medterms.com/script/main/art.asp?articlekey=3733
Last Editorial Review: 3/19/2012