Invasive meningococcal infections.
D016470:Bacteremia / Q000175:diagnosis / Q000453:epidemiology*; D006801:Humans; D015994:Incidence; D008585:Meningitis, Meningococcal / Q000175:diagnosis / Q000453:epidemiology; D008589:Meningococcal Infections / Q000175:diagnosis / Q000453:epidemiology*; D012698:Serologic Tests; D006113:United Kingdom / Q000453:epidemiology