I was just wondering if a child of 11 years old could still be diagnosed w/ cf or is this something that is diagnosed at a much younger age? My cousin is 11 and has had pneumonia several times in the last 2 years. She only weighs about 50 pounds and is about the size of a 6 year old. She has a terrible cough all the time and now the doctors have put her on the nebulizer machine. Please help.