COVID mRNA vaccination was a (very) large scale experiment that has yielded a lot of interesting data, has saved a lot of lives, and has damaged more people that would normally stop a Phase II clinical trial before it reached billions of people.
I work in this field, and the political and social dimensions of this experiment have basically ruined any chance to gain and apply useful knowledge generated by it.
It’s a shame.
I agree with most, excepting your assertion that the mRNA injection(s) "has saved a lot of lives."
That remains an assertion which has yet to be proven, especially given the more-than-three years of official data showing a mortality rate of 0.084 percent worldwide. Nations without these mRNA injections have fared far better than the US in actual reported deaths. The US CDC-created protocol has a mortality rate more than four times sub-Saharan Africa, for example. So the claim that mRNA injections have saved lives is not as yet sustained.
You are indeed correct in noting "the political and social dimensions of this experiment have basically ruined any chance to gain and apply useful knowledge generated by it." I think that has been the point. Best wishes.