What is Legionnaires’ disease?

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Legionnaires’ disease is a severe, often lethal, form of pneumonia. It’s caused by the bacterium Legionella pneumophila found in both potable  and non-potable  water systems.  Legionella pneumophila is spread by inhalation of contaminated droplets through activities such as showering.   It mostly  affects people with compromised immune systems, including cancer patients, people with chronic diseases and the elderly.


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