Let me add: I know this is partially tangential t your question. But I can have this rant in my heart because there isn't enough legal stricture in this matter. There flatly ought to be, even if it only covers the TDAP, MMR, and HEPB vaxes. There is no ethical question about giving children a fighting chance at long-term health, and the legal precedents about child neglect make this a no-brainer.