We were always told to imagine a senario where the paramedics would find our no blood card and cry " thank god! we almost gave her a blood transfusion!"
Thing is: when i worked in emergency medicine we were always stricted told never ever go rifiling through the patients pockets/handbag/ wallet!
Dos the blood card work? Dos it speak when the JW's can't?
Another thing i heard, which i never really belived is that when hospital staff have a unconcious JW they quickly pump a couple of pints of blood into them " just to get back at them!"