That is interesting. This is something that they have been researching for years & years. I've always thought that the yearly vaccines are not needed.

I agree with most of it, except I think a puppy should be vaccinated for corona. Granted it is a fairly uncommon virus and yes it usually resolves itself in a few days to a few weeks with some antibiotics, in older dogs you may not even need antibiotics or the sorts.
But in some cases it can be quite a problem, sometimes resulting in death.

My ex b/f had a great dane puppy, she was about 6 months old. She passed away due to the corona virus. It was not "common" in our area & the vet did not vaccinate for it. After a couple weeks in intensive care the vets care she just couldn't take it anymore and passed on her own.
That was so sad watching her deteriorate like she did. I never want to experience that again.
From now on all my dogs are vaccinated for it. I only vaccinate my dogs once every few years or so.