Chickenpox (Varicella) Vaccine

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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