title: Expanded programme on immunization. Measles outbreak in N'Djamena.
mesh_terms: D002596:Chad / Q000453:epidemiology; D002648:Child; D002675:Child, Preschool; D004196:Disease Outbreaks; D006801:Humans; D017589:Immunization Programs; D007223:Infant; D008457:Measles / Q000453:epidemiology* / Q000517:prevention & control