Severe Acute Respiratory Syndrome (SARS) is an infectious respiratory illness caused by the SARS-associated coronavirus (SARS-CoV), which emerged in 2003 and led to over 8,000 infections and 774 deaths worldwide before being contained in 2004. The virus exhibits an incubation period of 2 to 7 days, and transmission occurs through respiratory droplets, skin contact, and contaminated surfaces, with symptoms including fever, cough, and difficulty breathing. Prevention measures emphasize hygiene practices, use of protective gear, and proper cleaning of contaminated surfaces.