I’m vaccinated. How do you know the long term effects of mRNA vaccines?

The Bayesian probability leans heavily toward the vaccine being safe and the virus dangerous.

From what we are seeing the vaccine side effects are similar but considerably milder and short term, the virus sometimes has long term negative effects (lung capacity, fatigue, weakness, inability to concentrate…)

We have a long history with coronaviruses. I doubt you worried about any of the others before.