The defective gene in cystic fibrosis causes the production of abnormally thick and sticky mucus, which gums up the lungs, causing a persistent cough with sputum, wheezing and high risk of lung infections, among others. — AFP
David Fiant says his cystic fibrosis and the arduous therapy it required was so bad he "could no longer tell if I was living to heal myself or healing myself to live".
While waiting for a lung transplant, he was on oxygen therapy and had a six-hour daily care regime, as well as three to four weeks of antibiotic infusions a year.