Cystic fibrosis (CF) is a chronic, progressive and genetic (inherited) disease of the body's exocrine (mucus producing) glands which affects approximately 30,000 children and adults in the United States.

Cystic fibrosis (CF) primarily affects the respiratory, digestive and reproductive systems, as well as the sweat glands. The mucus secreted is very thick and blocks passageways in the lungs and digestive tracts.

Cystic fibrosis is transmitted to a child when both parents carry the recessive gene...