I wonder how many parents in the audience looked at their children sitting next to them and said NFW!
From what I have seen and heard and experienced, I don't think that this is the case. refusal of blood and its big 4 components is so ingrained in their psyche that it is a "given" that they just do not take it, Thankfully I have never come across a case with a child but several adult dubs of my acquaintance have faced the issue with a total resolute determination.(none of them died)
I think parents just blank out the possibility and pray that the worst never happens. If it should,and the State allows them to withhold...withhold they would!