World Health Day: 'target 2000--a world without polio'.
D003430:Cross-Sectional Studies; D004739:England / Q000453:epidemiology; D014943:Global Health; D006801:Humans; D017589:Immunization Programs; D015994:Incidence; D007223:Infant; D011051:Poliomyelitis / Q000453:epidemiology / Q000517:prevention & control* / Q000635:transmission; D011055:Poliovirus Vaccine, Oral / Q000008:administration & dosage / Q000009:adverse effects; D011159:Population Surveillance; D014852:Wales / Q000453:epidemiology; D014944:World Health Organization
D011055:Poliovirus Vaccine, Oral