Definition of Herpes simplex type 1
Herpes simplex type 1: A herpes virus that causes cold sores and fever blisters in and around the mouth. Here is a depiction of a typical fever blister caused by herpes simplex 1:
In rare cases, as when someone's immune system is severely compromised, this virus can cause infection of the brain (encephalitis).
Herpes simplex type 1 is also known as human herpesvirus 1 (HHV-1).
Source: MedTerms™ Medical Dictionaryhttp://www.medterms.com/script/main/art.asp?articlekey=3731
Last Editorial Review: 4/27/2011 5:27:15 PM
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