herpes simplex
noun
herpes sim·plex
-ˈsim-ˌpleks
: either of two diseases caused by herpesviruses (species Human herpesvirus 1 and Human herpesvirus 2 of the genus Simplexvirus) and marked especially by watery blisters on the skin or mucous membranes of the lips, mouth, face, or genital region
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Merriam-Webster unabridged
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