The reason the heart inflammation think didn't show up is because of how rare it is, not the amount of time passed. If the issue you are talking about is that rare, than my argument still stands.
As to something appearing years later, that seems extremely rare and could happen without getting the vaccine, just being exposed again to the virus. Oh, and neither of us are the people that should be evaluating that because we aren't medical researchers who have closely studied the incidents of vaccines causing reactions years later. I will trust the people who have extensively studied the problem.
