[Poliomyelitis in Chile. Laboratory study. II. Polio outbreak, August, 1969--August, 1970].
D002675:Child, Preschool; D002677:Chile; D004196:Disease Outbreaks; D006801:Humans; D007223:Infant; D011051:Poliomyelitis / Q000453:epidemiology*
Poliomielitis en Chile. Estudio de laboratorio. II. Brote de polio. Agosto 1969--agosto 1970.