Since the discussion has now mutated from "should kids be kept home" to the vaccination debate, my two cents:
Vaccination = Good, and perhaps necessary, to an extent
Over-vaccination = At best, unnecessary, and at worst, potentially very harmful
The problems are (1) that most "experts" do not take the time to acknowledge that there is a difference, and (2) we are far too dependent as a society on Big Pharm, who financially back most of the "studies" done on the issues, and who notoriously obscure a lot of the important data. As a result, it is very, VERY difficult to make completely informed, educated decisions about there the line is for "over-vaccination," and Big Pharm likes it that way because if it is too difficult to make an educated decision, most people will err on the perceived "safe side" of just doing it.