That was supposed to be happening because they were not done in the first round and we'll need to start vaccinating them once all the adults are done.
I am beginning to think the vaccine may end up blunting, rather than stopping, this bug. Given how mutable it appears to be and how quickly it spreads in spite of best efforts (even China, who have been fairly successful in controlling COVID, has been having another round of outbreaks), I can't see it being completely stopped very easily.
And there's still questions about whether it will stop people from carrying the virus without getting sick. I am pretty sure that I saw somewhere that the Israeli results suggest it does but I don't have the cite handy, but leaving that question unanswered means we can't really let down our guard with just vaccination.
Get used to wearing a mask, in other words, This may not end this year, even with vaccination.