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The automated records of over 250,000 members of a health maintenance organization were analyzed to assess the epidemiology of varicella and its complications between 1 July 1990 and 30 June 1992. All complications were verified by review of full-text medical records. The incidence rates of varicella in persons or = 15 years old, however, were greater than those reported for 1972-1978 (607 vs. 291/10(5) years, 15-19 years old; 175 vs. 33/10(5) years, > or = 20 years old). The rates of hospitalization for uncomplicated varicella, skin superinfections, and pneumonia in children were, respectively, 15, 11, and 4 times higher than previous estimates. Hospitalization rates for adults with pneumonia and uncomplicated varicella were > 5 times higher than prior figures. Thus, varicella in adults and varicella complications in general may be more frequent than previously estimated.
Choo et al. (Fri,) studied this question.
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