The CDC definitely says we should vaccinate almost all children against influenza. https://www.cdc.gov/flu/prevent/vaccinations.htm
https://www.cdc.gov/flu/fluvaxview/coverage-1920estimates.ht...
No more than 64% for school aged individuals. So, since you're supposedly using this as a reason why we should be keeping everyone locked down then I'm going to assume you feel the same for influenza? Which means you're saying we should have shut schools down and mandated all sorts of measures to protect them since the inception of the influenza vaccinations?
Full vaccination COVID is not an achievable goal.