title: Enhanced surveillance of epidemic meningococcal meningitis in Africa: a three-year experience.
mesh_terms: D000349:Africa / Q000453:epidemiology; D004196:Disease Outbreaks; D006801:Humans; D008585:Meningitis, Meningococcal / Q000453:epidemiology*; D011159:Population Surveillance; D014944:World Health Organization