CHICAGO, IL. (CNN) - Health officials in Chicago say two deaths are now part of an outbreak of Legionnaires' disease at the J-W Marriott hotel. Six other people were also diagnosed with the disease, which is a severe form of pneumonia.
Investigators say the victims visited the hotel between July 16th and August 15th.
Legionnaires' is a respiratory disease that is caused by bacteria usually found in water and is not contagious.
Hotel officials say they have been cooperating with health officials in their investigation.
They drained the hotel pool, whirlpool and contacted the majority of guests who stayed at the hotel during the four week period.