Quick Facts Cystic fibrosis is a rare and progressive genetic disease that causes thick mucus to build up in the lungs, digestive tract and other parts of the body. It causes persistent lung ...

Cystic fibrosis (CF) is a progressive genetic disease that adversely affects a person's lungs, pancreas and other vital organs, says Dr. Michael Boyle, president and CEO of the Cystic Fibrosis ...