Measles epidemiology and control in Western Nigeria.
D002648:Child; D002675:Child, Preschool; D006801:Humans; D007223:Infant; D008457:Measles / Q000453:epidemiology* / Q000276:immunology / Q000517:prevention & control*; D009549:Nigeria; D014505:Urban Population; D014611:Vaccination / Q000295:instrumentation