1976 Philadelphia Legionnaires' disease outbreak 1976 Philadelphia Legionnaires' disease outbreak The 1976 Legionnaires disease outbreak, occurring in the late summer in Philadelphia, Pennsylvania, was the first occasion in which a cluster of a particular type of pneumonia cases were determined to be caused by the "Legionella pneumophila" bacteria. Previous outbreaks were retroactively diagnosed as being most probably caused by Legionella bacteria. On July 21, 1976, the American Legion opened its annual three-day convention at the Bellevue-Stratford Hotel in Philadelphia, Pennsylvania. More than 2,000 Legionnaires, mostly men, attended the convention. The date and city were chosen to coincide with America’s celebration of the 200th anniversary of
Timeline of the SARS outbreak On the flight, he fell ill and upon arrival in Bangkok told an awaiting friend not to touch him and to call an ambulance to take him to a hospital. He was isolated in an intensive care unit. A similar outbreak of a mysterious respiratory disease was reported among healthcare workers in Hong Kong. On March 12, WHO issued a global alert about a new infectious disease of unknown origin in both Vietnam and Hong Kong. On March 15, WHO issued a heightened global health alert about mysterious pneumonia with a case definition of SARS as after cases in Singapore