The infection is spread by droplets and has an incubation period of 2-6 days. Type 1 is generally shed for 4-7 days, but it can be shed for 14 days. Reinfection can occur at any age but symptoms are milder. Isolation is from nasopharyngeal secretions via culture, immunofluorescent, and ELISA methods. Treatment is supportive. (Report of the Committee on Infectious Diseases, American Academy of Pediatrics, Elk Grove Village, IL., 22nd Edit., 1991, pp. 343-344.)
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