> 12 year olds
a good question. May depend on the probability of getting COVID, as probably controlled vaccine is always better than uncontrolled virus – Or, if you wish, made in USA v. made in China …
So, if a kid will be at school and camp, and interact a lot, then the chance of COVID over time is pretty high, and I don’t see why not have it. If there will be less interaction during summer, maybe wait a month or two for possible problems to be worked out. I am not sure also why there are no (reported) trials on smaller doses for younger ages. Maybe gov guys do not want “confusion” in people’s minds – just give everyone the same.