You mean the stuff the whole world got injected with in 2020? Good to know!
Seriously though, I am very pro-vax, but the fact that studies like these come out now is just confirmation that people had the right to doubt the safety of mRNA back then. Many people shamed others for being anti vax but everyone has the right to be careful.
mRNA vaccines and testing of them have been around far longer then 2020
People have rights but they also have the responsibility to be scientifically literate enough to know that analyzing data about the vaccine was prudent regardless of anything and does not suggest their prostration to antivax demagogues was smart.
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Why would repeating a study now and getting the same result as when it was first measured in 2020 be a reason to doubt the safety?
I’m also pro-vax, so I don’t think it is correct to equate ignoring the preponderance of current evidence (in 2021 or 2026) for vaccine protection as being careful. That just seems the logical fallacy sold by “vax hesitant” and social media influencers to make people feel smart to ignore statistics and “make their own choice based on intuition”