SARS
Severe acute respiratory syndrome–related coronavirus (SARSr-CoV or SARS-CoV) is a species of coronavirus that infects humans, bats and certain other mammals. It is an enveloped positive-sense single-stranded RNA virus that enters its host cell by binding to the angiotensin-converting enzyme 2 (ACE2) receptor. It is a member of the genus "Betacoronavirus" and the only known species in the subgenus Sarbecovirus.