Warts - Definition
Warts are small, benign (harmless) growths caused by a viral infection. They occur on the skin or the mucous membrane. The mucous membrane is tissue that lines the nose, throat, digestive tract, and other body openings. The viruses that cause warts are members of the human papilloma virus (HPV) family. Warts can be transmitted from one person to another and they can travel from one part of the body to another.

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