"Decades of studying mRNA have shown no long-term side-effects"

"According to the Children’s Hospital of Philadelphia , the vaccine is not expected to have long-term negative effects for a few reasons:

First, most negative effects occur within 6 weeks of receiving a vaccine, which is why the FDA asked the companies to provide 8 weeks of safety data after the last dose.
Second, the mRNA in the vaccine breaks down pretty quickly because our cells need a way to stop mRNA from making too many proteins or too much protein.
But, even if for some reason our cells did not break down the vaccine mRNA, the mRNA stops making the protein within about a week, regardless of the body’s immune response to the protein."

But we should listen to all of the amateur scientists on the interwebs.