title: [Meningococcal meningitis, epidemiological study in the capital city of Madrid].
mesh_terms: D006801:Humans; D008137:Longitudinal Studies; D008585:Meningitis, Meningococcal / Q000453:epidemiology*; D013030:Spain
vernacular_title: Meningitis meningocócica, estudio epidemiológico en Madrid capital.