Legionnaires' disease on symptom onset dates from past outbreaks. In this way, the eventual likely size of an outbreak can be predicted, enabling efficient and effective use of public health resources in managing an outbreak. The first recognized cases of Legionnaires' disease occurred in 1976 in Philadelphia; among more than 2000 attendees of an American Legion convention held at the Bellevue-Stratford Hotel, 182 attendees contracted the disease and 29 of them died. In April 1985, 175 people in Stafford, England, were admitted to the District or Kingsmead Stafford Hospitals with chest infection or pneumonia. A total of 28 people died. Medical diagnosis
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