Legionnaires’ Disease? Stuff in your house may be putting you at risk. Statistics indicate that one in ten people who contract Legionnaires’ disease will die. A 400% increase of Legionnaire’s disease was reported between 2000 and 2014. About 5,000 cases of the disease are now reported each year in the United States. People can get infected when they inhale Legionella contaminated water vapor or mist in air they breathe. Legionnaires' disease is a severe, often lethal, form o