title: Progress towards poliomyelitis eradication in Nigeria, January 2003-March 2004.
mesh_terms: D006801:Humans; D017589:Immunization Programs; D015994:Incidence; D009549:Nigeria / Q000453:epidemiology; D011051:Poliomyelitis / Q000453:epidemiology / Q000517:prevention & control*; D011055:Poliovirus Vaccine, Oral / Q000008:administration & dosage; D011159:Population Surveillance
chemical_list: D011055:Poliovirus Vaccine, Oral