Distribution of poliovirus in a small community.
D000818:Animals; D002417:Cattle; D002648:Child; D002675:Child, Preschool; D004196:Disease Outbreaks / Q000453:epidemiology* / Q000266:history; D005260:Female; D006666:History of Medicine; D006801:Humans; D007223:Infant; D008297:Male; D010414:Pennsylvania; D011051:Poliomyelitis / Q000453:epidemiology* / Q000266:history; D017955:Poliovirus / Q000302:isolation & purification*