title: Hospitals harbor a built-in disease source.
mesh_terms: D000389:Air Conditioning; D003428:Cross Infection / Q000382:microbiology*; D004196:Disease Outbreaks / Q000209:etiology; D004197:Disease Reservoirs; D006801:Humans; D007875:Legionella / Q000254:growth & development*; D007877:Legionnaires' Disease / Q000635:transmission*; D014691:Ventilation; D014707:Vermont