"New' Legionnaires' disease? It may predate us on earth.
D000389:Air Conditioning; D000391:Air Microbiology; D003428:Cross Infection / Q000517:prevention & control*; D004196:Disease Outbreaks; D006801:Humans; D007877:Legionnaires' Disease / Q000453:epidemiology / Q000517:prevention & control*; D014481:United States