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Chicken pox vaccine
This is one of the newest vaccines available. Varicella vaccines prevent infection in 70-95 percent of recipients. Children who develop varicella despite vaccination have milder infections than those not immunized. It is not clear how long vaccine immunity lasts. With natural infection, immunity lasts a lifetime. The vaccine-induced immunity may not be so durable. More experience with the vaccine will be required to answer this question definitively.
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Date Last Modified: 08/26/2003 11:25