So you're saying that rather than just vaccinate kids once the vaccine is determined safe for their age group, we should instead take each child on a case by case basis and determine if their particular underlying issues warrants the protection of a vaccine?
And so that begs the question, are you assuming that we will be 100% correct in determining which kids to vaccinate and which kids not to vaccinate?
And assuming you recognize that that is impossible, it now brings me to the next group of kids you've decided are collateral damage - the kids we think are healthy but have underlying issues that haven't yet been detected or aren't deemed risky enough to warrant a vaccine.
Or we could just vaccinate all the kids and not have this problem.