Cystic fibrosis (CF) is a chronic and progressive disease, often diagnosed in childhood, that causes mucus to become thick and sticky. The mucus builds up and clogs passages in the lungs, pancreas, and many other organs in the body.

There is no cure for CF, but early diagnosis and new treatments are helping people live longer. Management of the disease varies from person to person and generally focuses on treating respiratory and digestive problems to prevent infection and other problems.