A Bethlehem, PA university worker has recently been diagnosed with Legionnaires’ disease, the deadly form of pneumonia. So far, this is an isolated case, with only the one worker having a confirmed diagnosis. Students, staff, and faculty were notified of the incident as soon as the worker’s case was confirmed according to the University. The University immediately tested their heating and cooling system and water system after the diagnosis was reported. The water system tested clean, however, the HVAC system test came back positive for the presence of legionella, the bacteria that causes the disease. The ventilation system was shut down and cleaned thoroughly, reports indicate. It is currently up and running again.