Legionnaires' disease.
D000328:Adult; D000368:Aged; D004196:Disease Outbreaks / Q000453:epidemiology; D005260:Female; D006801:Humans; D007877:Legionnaires' Disease / Q000175:diagnosis* / Q000453:epidemiology; D008297:Male; D008875:Middle Aged; D006113:United Kingdom; D014481:United States