i was curious after reading these posts so i sent an email to the MAW foundation asking specifically about CF and this was their reply:
Who can receive a wish?
All children under the age of 18 with a life-threatening medical condition are potentially eligible for a wish. The purpose of the Make-A-Wish Foundation is to grant the wish of each child between the ages of 2-½ and under 18 living with a life-threatening medical condition, i.e., a progressive, degenerative, or malignant medical condition that has placed the child's life in jeopardy. Prior to their 18th birthday, each child must be referred, and determined to be currently medically eligible by their primary attending medical professional. The Make-A-Wish Foundation is committed to granting the wish of each child who meets the Foundation's eligibility criteria at the time they are referred to us. Each child's treating medical professional makes the final determination of whether his or her medical condition currently meets the Foundation's eligibility criteria.
Does a child's condition have to be terminal to qualify for a wish?
No. We do not deny potential wish children because their illness may not be terminal. Many of the children who qualify for a wish go on to lead healthy and happy lives. We are committed to reaching every medically eligible child and providing the hope, strength, and joy that a wish can bring.
(just wanted to share what they sent me)