Things will happen to people between March of 2021 and now when folks were getting COVID jabs and it's easy to blame everything on that, if I eat ice cream for dessert tonight and find out I have cancer the next morning I don't blame the ice-cream. Your plaque accumulation surely has nothing to do with a vaccine, whether it's for the flu or Tdap or whatever. And don't panic about a CAC score of 613 at 67, that's actually pretty good, as I've stated here before many times my physician tells me of patients he has in their 90s with CAC scores in the thousands.