1976 Philadelphia Legionnaires' disease outbreak States Center for Disease Control and Prevention (CDC) in 2017 only use the term Legionnaires' disease to refer to the serious version with pneumonia. CDC investigators quickly discovered outbreaks of respiratory disease caused by "L. pneumophila" dating back to 1959. An outbreak of what was dubbed Pontiac fever occurred in a health department in Pontiac, Michigan in July 1967. No one died. Although caused by the same bacterium, Pontiac fever is a milder ailment than Legionnaires' disease. Pneumonia is absent in those with Pontiac fever. An outbreak of pneumonia in July–August, 1965, at St. Elizabeths Hospital in Washington, DC, which
Tornado outbreak sequence of June 1966 Tornado outbreak sequence of June 1966 The Tornado outbreak sequence of June 1966 was a series of tornado outbreaks which occurred between June 2 and June 12. The most destructive tornado of this event occurred on the early evening of Wednesday, June 8, 1966, when Topeka, Kansas was struck by an F5 rated tornado. It started on the southwest side of town, moving northeast, passing through several subdivisions and over a local landmark named Burnett's Mound. 57 tornadoes were confirmed during the 11-day span, which left 18 people dead and 543 injured. According to a local Native American legend, Burnet's