Results of oral poliomyelitis vaccination in the G.D.R.
D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D005859:Germany, East; D006801:Humans; D007223:Infant; D011055:Poliovirus Vaccine, Oral; D014611:Vaccination
D011055:Poliovirus Vaccine, Oral