Thanks for your question on Healthcare Magic. I can understand your concern. You can not donate your lung because you won t live normal life with one lung. So forget about donating your lung. Yes, cystic fibrosis patients can live good quality of life after lung transplant. There is lung transplant registry maintained globally. You should enroll your friend s name in it. When the donor lung is available, your friend will get lung transplant done. So consult local pulmonologist there and discuss all these. Hope I have solved your query. I will be happy to help you further. Wishing good health to your friend. Thanks.