Not an expert, but from what I understood, SARS-Cov-2 infects cells through the ACE2 receptor that is present in all kinds of different cells along the blood vessels. It's "just" particularly present in the cells inside the lungs, which is why so many Covid patient could not take up enough oxygen anymore. But that somewhat nebulous "long tail" of other Covid symptoms is caused by the virus infecting other cells inside the body.
So I guess that technically makes it a vascular and not a respiratory disease.
I think COVID is now considered endemic globally, it's more manageable than it was when it first broke out but it still causes deaths and weird after effects, probably not as many as before but will probably stay with us for some time to come.
It may be better to do what we do with the flu, reevaluate the vaccine from time to time, and give the new version to everybody.
But also, around here covid seems to be a smaller problem than influenza, by a rate of 2 if you count only deaths. So it's understandable why people don't want to mess with it.
Is that covid (vascular?) or something I have not heard of ?