Expanded programme on immunization. Poliomyelitis in 1987, 1988 and 1989--Part II.
D003431:Cross-Cultural Comparison; D003430:Cross-Sectional Studies; D005060:Europe / Q000453:epidemiology; D006801:Humans; D015994:Incidence; D010139:Pacific Islands / Q000453:epidemiology; D011051:Poliomyelitis / Q000453:epidemiology / Q000517:prevention & control*; D011054:Poliovirus Vaccine, Inactivated / Q000008:administration & dosage*
D011054:Poliovirus Vaccine, Inactivated