Camilla,
I am assuming you have a child or children with thalassemia or something like it. I was not diagnosed until 14, but, was ill my whole life prior to diagnosis. I don't know if my parents had a conscious game plan of communication with me, but, I am now 49, and this is something I have really thought about. I have always appreciated it that my parents were open and honest with me, and I didn't have to worry about what was going on when I didn't know. I knew. If you are worried about telling your child, remember, you don't have to tell them all of what a dr thinks. Just be honest about reality. I remember my doctor looking at me, as a 14 year old, telling me he believed I only had a year to live. Such negative opinions a child can do without. Along with the level of honesty you provide, remember that dishonesty can be worse. Don't hide things the child should know. The when, where and how stuff. Appointment dates and what is going to happen. Don't wait until the last minute then suprise them with a new procedure. Prepare, plan, educate ahead of time. Make your child feel an active part in their treatment, just like anything else they do in life that is good. Clubs, events, if it goes on the calander, don't hide it
I wish you the very best with this delicate issue. Hopefully your child will feel empowered by your interest in doing things right.
Take care, OldThalGal