About CFWhat Is Cystic Fibrosis? Cystic fibrosis (CF) is a life-threatening genetic disease that primarily affects the lungs and digestive system. An estimated 30,000 children and adults in the United States (70,000 worldwide) have CF.
Quick Facts about CFIn the United States:

About 1,000 new cases of CF are diagnosed each year.
More than 75 percent of people with CF are
diagnosed by age 2.
Nearly half of the CF population is age 18 or older.