Three former guests at the EPIC Hotel in Miami have been diagnosed with Legionnaires' disease since October. The outbreak has caused the hotel to move 300 guests out of the premises after one former guest died of the disease.
Health officials said that the remaining two people contacted the illness in November. They found that a water filter, which was powerful enough to filter chlorine from the water supply, encouraged the growth of bacteria.
Legionnaires' disease is a bacterial disease that can be transmitted by contaminated water vapor. Some 8,000 to 18,000 patients are hospitalized annually with the disease, according to estimates from the U.S. Centers for Disease Control and Prevention.