Officials track cause of Legionnaires' disease outbreak at Pa. hospital.
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D003428:Cross Infection / Q000453:epidemiology; D004196:Disease Outbreaks; D006744:Hospital Bed Capacity, 100 to 299; D006801:Humans; D007877:Legionnaires' Disease / Q000453:epidemiology* / Q000209:etiology; D010414:Pennsylvania / Q000453:epidemiology