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Chickenpox (Varicella)

Chickenpox Vaccine Can Prevent Spread of Chickenpox Chickenpox (its medical name is varicella) is a common and contagious disease caused by the varicella-zoster virus. (In later life, a second exposure to this same virus can cause a painful skin condition known as herpes zoster or shingles.) Chickenpox is usually mild, but can have serious consequences. …