“SARS (severe acute respiratory syndrome, SARS-CoV-1) was a respiratory illness that spread in many countries around the world in 2002 and 2003. For many people, SARS caused flu-like symptoms (like fever and headache), but it progressed to severe illness in about 10% to 20% of people during the outbreak.

More than 8,000 people in 29 countries had SARS during the 2002-2003 outbreak. There was a small outbreak related to occupational exposure in 2004. Preventive measures stopped its spread, and only nine people were infected. There haven’t been any reported cases since then.

A virus called SARS-associated coronavirus (SARS-CoV-1) causes SARS.”

Cleveland Clinic (Severe Acute Respiratory Syndrome (SARS): Cause & Treatment)