EPIDEMIOLOGIC OBSERVATIONS OF VIRUS INFECTIONS IN A CLOSED POPULATION OF YOUNG CHILDREN1

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Abstract
Cesario, T. C, R. L. Kriel, G. G. Caldwell, L. E. Davis and T. D. Y. Chin (Ecological Investigations Program, Center for Disease Control, 2002 West 39th Street, Kansas City, Kansas 66103). Epidemiologic observations of virus infections in a closed population of young children. Amer J Epidem 94: 457–466, 1971.—An 18-month study of respiratory virus infections was conducted in a home for mentally retarded children. Twenty-three children 5 months to 9 years of age were studied. Throat swabs were collected weekly and sera were drawn every 3 months from each child. Five major outbreaks of virus infections were observed, including epidemics caused by adenovirus types 1 and 3, respiratory syncytial virus, Hong Kong influenza virus and varicella-zoster virus. The adenovirus epidemics were a distinct contrast; that associated with type 1 was entirely asymptomatic, and that associated with type 3 produced a considerable amount of illness. The respiratory syncytial virus and Hong Kong influenza outbreaks occurred within 2 weeks of each other, and both affected the majority of children in the home. Fourteen of 16 susceptibles were affected by the chickenpox epidemic, and varicella-zoster virus was isolated from the pharynx of one child on the fourth day of the rash.

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