Progress towards eradicating poliomyelitis in Nigeria, January 2008-  July 2009.
D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D006801:Humans; D015994:Incidence; D007223:Infant; D009549:Nigeria / Q000453:epidemiology; D011051:Poliomyelitis / Q000453:epidemiology / Q000517:prevention & control*; D017955:Poliovirus; D011055:Poliovirus Vaccine, Oral; D011159:Population Surveillance
D011055:Poliovirus Vaccine, Oral