> Long-term side effects don't pop up right away, so no, I can't say what side effects I am worried about. However, I think a decade is about the right amount of time to watch.
So we can expect in 2031 you'll get vaccinated?
> If we decide that taking an experimental vaccine should be necessary for free and unrestricted travel across borders, what's to stop governments from implementing the same thing domestically?
Regarding restriction your movement, as GP states countries have had rules for vaccination during travel for a long time. You have no right to visit another country and countries are free to restrict your freedom of movement within their laws. That's not a liberty you possess, and you're making up scenarios to maximize your potential persecution. Unless that's seriously in discussion, which it's not, it's being dramatic for drama's sake.