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NCI Dictionary of Cancer Terms

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NCI Dictionary of Cancer Terms



herpes simplex virus  listen  (HER-peez SIM-plex VY-rus)

  A type of virus that causes herpes infections and has DNA as its genetic material. There are two types of herpes simplex viruses. Infections with type 1 viruses cause cold sores on the lips or nostrils. Infections with type 2 viruses cause sores on the genitals (external and internal sex organs and glands). Also called HHV, HSV, and human herpesvirus.