Paralytic poliomyelitis in Monrovia (years 1964-67).
D002648:Child; D002675:Child, Preschool; D005006:Ethnicity; D005260:Female; D006801:Humans; D006920:Hygiene; D007223:Infant; D007231:Infant, Newborn; D007988:Liberia; D008297:Male; D011051:Poliomyelitis / Q000175:diagnosis / Q000453:epidemiology* / Q000517:prevention & control; D012737:Sex Factors; D014611:Vaccination