He's trying to be formal. When Covid should be good enough.
Best to think of the scramble as SARS-CoV to cover any Coronavirus capable of creating Severe Acute Respiratory Syndrome. With follow up numbers SARS-CoV-1 or 2. Then add in the year at the end. Frequently the main difference is the animal reservoir they came from.
If you want to fry a few neurons start with this
Coronavirus belongs to the family Coronaviridae and the subfamily Coronavirinae and based on genetic properties, this subfamily has been divided into four genera: a-coronavirus, ß-coronavirus, ?-coronavirus and d-coronavirus