[Methods of investigating the morbidity of poliomyelitis].
D002648:Child; D002675:Child, Preschool; D004812:Epidemiologic Methods; D006306:Health Surveys; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D011051:Poliomyelitis / Q000453:epidemiology*; D011336:Probability