chickenpox
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Chickenpox
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Common, usually mild disease, caused by a virus of the herpes group and transmitted by airborne droplets. Chickenpox chiefly attacks children under the age of ten. The incubation period is two to three weeks. One attack normally gives immunity for life.
The temperature rises and spots (later inflamed blisters) develop on the torso, then on the face and limbs. The sufferer recovers within a week, but remains infectious until the last scab disappears.
The US Food and Drug Administration approved a chickenpox vaccine in March 1995. Based on a weakened form of the live virus, the vaccine is 70–90% effective. A vaccine is available in Europe, but is only used in children with an impaired immune system.
© RM 2009. Helicon Publishing is division of RM.
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