Even the flu vaccine has known potential side effects
And guidance hasn’t changed because the benefits still outweighed the risks, though more studies are warranted and are in process in light of updated vaccines and mutating variants.
We didn’t wait until the studies could be completed because we had enough data.
Yes, it's unfortunate that the vaccine has side effects. But if you're seriously concerned about the risk of heart problems the vaccine is the safer bet.
The question is only: did you want higher or lower chances of survival? Cherry picking a situating you think you may have experienced and worrying about it is not useful. Attribution is hard. In single cases close to impossible.
The day I had issues I was camping. Given the testing I certainly didn’t have COVID unless the tests are wrong. No unrelated heart issues prior to this, EKGs everything prior showed normal.
I’d rather not have heart issues to help someone else feel safe. And if my chances are lower, then how come after taking the first dose and having issues, then ceasing further doses at my Drs request, how come I never got it? You see you can isolate yourself and invalidate the need for increased survival rates. Bonus, you don’t have heart issues either!
Really all this shows me is its “every man for themselves”. All anybody cares about is if they survive or if they get a hospital bed if needed. And they’ll force, or attempt to force, others to do things to give them an extra level of safety. Because of this, you’ve created a “new vaccine” antivaxer
Which works for some diseases. Others are only effective for shorter periods of time and/or against specific variants. The flu vaccine should be a familiar example to most people, needing periodic refreshers that are most effective against certain variants and not others.
It's also worth noting that the diseases that are treated as a "one and done" are generally those where you're unlikely to be exposed in day to day life for a variety of reasons.