Do children carry a No Blood card at some point say after being baptized?
Considering the JWs are now 8 million plus and have been in the millions for the last 40 years I imagine thousands of children may have died for want of a transfusion. It's not just just trauma where the situation is immediate. It also may be death because the surgeons couldn't operate without blood for many decades (open heart surgery) and a child couldn't survive that kind of surgery (great blood loss).
More deaths may have resulted if parents are waiting for the courts to step in. Or a parent is arguing the merits of blood while a child needs treatment.
Some cancer treatments require blood to offset the effects of treatment. Starting with surgery and/or chemo.
We have also had cases where a mother to be bleeds out losing the unborn baby as well.
Kids are often more accident prone and suffer trauma. In poorer countries and medical skills not the best more blood may be necessary.
In the Awake Magazine those children themselves refused blood and a judge allowed it on the basis that they were old enough to make a faith based decision. Of course the parents and congregation encouraged the stance.