Meningococcal meningitis.
D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D003430:Cross-Sectional Studies; D003906:Developing Countries; D004196:Disease Outbreaks; D005260:Female; D006801:Humans; D015994:Incidence; D007223:Infant; D008297:Male; D008302:Mali / Q000453:epidemiology; D008585:Meningitis, Meningococcal / Q000453:epidemiology*