Epidemiology of meningococcal infection.
D000328:Adult; D002648:Child; D002675:Child, Preschool; D004196:Disease Outbreaks / Q000453:epidemiology; D006801:Humans; D007223:Infant; D008589:Meningococcal Infections / Q000453:epidemiology*; D009345:Neisseria meningitidis / Q000145:classification / Q000472:pathogenicity; D012703:Serotyping; D006113:United Kingdom