Regardless of why this was downvoted, it deserves an upvote for being correct.
"Are there long-term side effects caused by mRNA COVID-19 vaccines? How do we know?" Basically, no because we've studied them. mRNA vaccines are notoriously easily destroyed.
https://immunizebc.ca/ask-us/questions/are-there-long-term-s....
Is there some common knowledge that counters this that I'm missing?