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Warts are benign epidermal neoplasms that are caused by human papilloma viruses (HPVs), which are small DNA viruses. There are more than 100 different types of HPVs, and new types are discovered each year.
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Varicella-zoster virus, a herpesvirus, causes varicella (chickenpox) and, after endogenous reactivation, herpes zoster (shingles). Varicella, which is recognised by a characteristic vesicular rash, arises mainly in young children, although older individuals can be affected.
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Varicella, or chickenpox, is an acute communicable disease characterized by a generalized vesicular rash. Because it is highly contagious, most individuals contract it in childhood.
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The following Clinical Topic Tour provides an overview of (HZ) and was adapted from materials published by the CDC, the US Food and Drug Administration, and the National Institute of Allergy and Infectious Diseases.
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