MRNA has been decades in the making. Ask Jerry and Whitinsvillewx who are involved with this. There is a lot of information out there on things stopped because of side effects like pain or swelling near the shot. I saw that deemed as a "severe" side effect. Really?
We have the largest sample size ever for a vaccine. So far from what I have seen, things seem to be going well overall in terms of health side effects. For long term stuff, MRNA technology has been around for awhile. I'm sure someone can find a side effect and say "See...I told you!!" But when you have a sample size in the billions, you'll find anything. I've talked to some in the field and they are confident in the technology. MRNA is now being looked at to fight cancer. That's pretty effing awesome.
I feel like people will just believe what they want to believe. The same opinions on weather and climate change have been in parallels with this. Most of those who are "proud" not to be vaccinated and brag about it are just selfish people consumed by everything being a conspiracy. If some are hesitant because they feel there isn't enough data, I can respect that. But you do have a huge population that are extremely ignorant and think this is "a creating from the libs."