You do understand that the seasonal flu is also a corona virus.
It is not.
Influenza virus is as closely related to the coronavirus family as humans are to snails. Humans and snails are both animals, but that’s where the similarities end. We don’t even share the same phylum.
Influenza:
Kingdom: Orthornavirae
Phylum: Negarnaviricota
Class: Insthoviricetes
Order: Articulavirales
Family: Orthomyxoviridae
SARS-CoV-2:
Kingdom: Orthornavirae
Phylum: Pisuviricota
Class: Pisoniviricetes
Order: Nidovirales
Family: Coronaviridae