[Poliomyelitis in Chile. Laboratory study. I. September 1967-August 1970].
D002675:Child, Preschool; D002677:Chile; D005243:Feces / Q000382:microbiology; D006801:Humans; D007223:Infant; D011051:Poliomyelitis / Q000453:epidemiology* / Q000382:microbiology; D017955:Poliovirus / Q000302:isolation & purification
Poliomielitis en Chile. Estudio de laboratorio. I. Septiembre 1967-Agosto 1970.