Legionnaires' disease that occur globally is not known. Legionnaires' disease is the cause of an estimated 2-9% of pneumonia cases that are acquired outside of hospital. An estimated 8,000 to 18,000 cases a year in the United States require hospitalization. Outbreaks of disease account for a minority of cases. While it can occur any time of the year, it is more common in the summer and fall. The disease is named after the outbreak where it was first identified, at a 1976 American Legion convention in Philadelphia. The length of time between exposure to the bacteria and the appearance of symptoms is
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