Chickenpox vaccine is the best way to prevent chickenpox, thereby protecting children and adults from the severe complications and death associated with the disease. Even with uncomplicated chickenpox cases, lost time from school and work and the cost of medications or treatment that may be needed can result in a significant cost for the family. At least one dose of chickenpox vaccine or evidence of immunity* is required for all children aged 18 months and older in licensed child care facilities and for all children entering a California school at kindergarten (K) level (or first grade if K was skipped) or transferring to a California school at any grade as of July 1, 2001.
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