I can see where that impression came from since it is a generic sounding name, but SARS is not a generic symptom name like "fever" or "cough." There is only the SARS disease, caused by the SARS-cov virus, and the related COVID disease, caused by another strain of the SARS-cov virus. the strain of virus causing covid is of the same species as the virus that caused SARS. In general, biology names are just really annoying and nonsensical, so I totally see where it's easy to be led astray by these annoying, generic sounding names, the reuse of the word SARS for a specific disease and a species of coronavirus strains, all of which are the same single species and are related and are called SARS-cov viruses, but where only one of them causes the disease called SARS, while another one causes the disease called COVID-19. And to add to the confusion, people just refer to COVID-19 as COVID, but all COVID stands for is "Coronavirus Disease." So the coronaviruses are a family of genetically/evolutionarily related viruses, but only one of them, a strain of the sars virus species, causes coronavirus disease. And while lots of diseases cause respiratory issues in the middle east, only one specific coronavirus gets to cause Middle East Respiratory Syndrome

"Taxonomically, SARS-CoV-2 is a strain of severe acute respiratory syndrome-related coronavirus"

https://en.wikipedia.org/wiki/Severe_acute_respiratory_syndr...

The official paper announcing the name of SARS-COV-2, Titled: The species Severe acute respiratory syndrome-related coronavirus: classifying 2019-nCoV and naming it SARS-CoV-2

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7095448/