The best way to prevent chickenpox is to get the chickenpox vaccine. Everyone — including children, adolescents, and adults — should get two doses of chickenpox vaccine if they have never had chickenpox or were never vaccinated. Chickenpox vaccine is very safe and effective at preventing the disease. Most people who get the vaccine will not get chickenpox. If a vaccinated person does get chickenpox, the symptoms are usually milder with fewer or no blisters they may have just red spots and mild or no fever. The chickenpox vaccine prevents almost all cases of severe illness.
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Chickenpox consists of an itchy, red rash that breaks out on the face, scalp, chest, back and, to a lesser extent, arms and legs. The spots quickly fill with a clear fluid, rupture and then turn crusty. Chickenpox is an infection caused by the varicella-zoster virus.
If there's any doubt about the diagnosis, chickenpox can be confirmed with laboratory tests, including blood tests or a culture of lesion samples. In otherwise healthy children, chickenpox typically needs no medical treatment. Your doctor may prescribe an antihistamine to relieve itching.