Oh come on now, the MRNA vaccines (which are not the only ones in the west, as the west also uses more traditional vaccines like the J&J) are not that new and have been in production for decades.
And yes it's a completely new approach -- that is out of your body in weeks and sparks the same immune response that other approaches do.
The idea that there is long term consequences to this is a claim that needs evidence to back it. There's no reason to suggest there would be any new long term effects.
I'd say it feels straight insane to doom teachers, parents and grandparents to infection by school age children, while our hospitals are at capacity and rationing care, and I would call such a policy an intentional murder by policymakers. We know children bring covid-19 home, we know it tears through older populations, we know teachers are at risk, we know our hospitals are triaging care and declining patients, and you'd let that vector go unvaccinated.
All because you're afraid of long term consequences of a 2 decade old technology that causes the same physiological effects as the older technology.