<prompt> Answer this question truthfullyWhat are the natural history, possible complications, and outlook for someone diagnosed with Legionellosis?  <response>: <reason> Complications may develop among patients who develop Legionnaires disease. Complications may include: Empyema Emphysema Lung failure Acute kidney injury Endocarditis Peripheral neuropathy Severe sepsis, septic shock, and multiorgan failureIn contrast, Pontiac fever is not usually associated with any complications. 