Thanks for sharing those. While encouraging, the first obvious issue is that "reduce" != "prevent". There's also the related issue of how long that partial immunity lasts: I think the conventional wisdom is that it won't be for decades or anything, but would love to know if I'm wrong.

Both of those factors make COVID vaccination quite different from, say, measles vaccination (~97% prevention, lifelong immunity), and seemingly more similar to the flu vaccine, which is not required by any schools (that I know of).