That's overkill, as shown... but I recall reading somewhere that SOP in 'some' Hospitals is to actually tattoo 'dots' on the children, so that They can distinguish them for future care (if the parents screw up they don't want to harm the children or worry about malpractice)
- if Baby 1 gets his shots, but Baby 2 has the sniffles, they may have to come back in a day or two... if the Parents get confused, baby 1 gets double dosed and baby 2 is left out... neither is good