Legionnaires' disease first came to public attention in 1976 during an outbreak at an American Legion convention in Philadelphia.

The health department hasn't said which buildings have been affected, but 11 cooling towers -- where screening results were positive for legionella bacteria -- have been remediated.

Cases of legionellosis, which causes Legionnaires' disease, are up in Arizona. Not all cases of legionellosis are severe.

An outbreak of Legionnaires’ disease in New York City has killed two people and sickened 58 since late July. The disease is a ...