Probably your confusion stems from ignorance. > Severe acute respiratory syndrome (SARS) is a viral respiratory disease of zoonotic origin caused by the virus

Probably your confusion stems from ignorance. > Severe acute respiratory syndrome (SARS) is a viral respiratory disease of zoonotic origin caused by the virus SARS-CoV-1, the first identified strain of the SARS-related coronavirus. In December 2019, a second strain of SARS-CoV was identified: SARS-CoV-2. This strain causes coronavirus disease 2019 (COVID-19), the disease behind the COVID-19 pandemic. https://en.m.wikipedia.org/wiki/SARS https://en.m.wikipedia.org/wiki/SARS The two strains are closely genetically related. There was already evidence of airborne spread back during the 2002 SARS-CoV-1 outbreak.