Primary Care ServicesWell child exam and immunizations

    Chickenpox (Varicella)

    The disease

    The disease

    Chickenpox is a highly contagious disease. It produces a fever, decreased energy and a characteristic rash. In rare cases chicken pox can lead to pneumonia, encephalitis (brain swelling) or death.

    The vaccine

    The chickenpox vaccine is 95 percent effective against severe disease. A small percentage of children who respond to the vaccine will still develop mild disease.

    Side effects

    • Fever
    • Soreness, redness, discomfort at site of injection
    • A chickenpox-like rash (around five lesions) at the injection site or elsewhere on the body

    More information



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