Epidemiologic investigation reports rapid nosocomial transmission and superspreading of severe acute respiratory syndrome, highlighting the need for rigorous containment strategies.
investigating an outbreak of severe acute respiratory syndrome (SARS). This is a novel condition caused by the SARSassociated coronavirus (SARS-CoV) and is characterized by both an atypical pneumonia and efficient nosocomial transmission. This report summarizes epidemiologic features of this outbreak in Singapore, including the influence of super spreaders * and the national prevention and control strategy. † On March 6, 2003, MOH was notified about three persons who had traveled to Hong Kong during late February and were admitted during a 5-day period to local hospitals for pneumonia (1). These patients included Case 1 and a traveling companion. They had been guests at Hotel M (Kowloon, Hong Kong) on February 20 and 21, coinciding with the stay of a person with SARS who transmitted disease to at least 13 guests (2). On March 14, MOH was notified about six persons,
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