Yes, Legionnaires' disease can reoccur. This disease is a severe form of pneumonia caused by a bacterium known as legionella.

Legionnaires disease was given its name because of where and when the first cases happened. The first cases were during a convention of the American Legion.

Approximately 10,000-40,000 people in the United States develop Legionnaires' disease annually.

Legionnaires Disease

Legionnaires Disease first occurred at a convention in a hotel, I believe in Philadelphia PA if I remember correctly.