Abstract
The average age of death of patients with cystic fibrosis used to be one year. It is now five years. A child is born with cystic fibrosis every two and one-half hours, and it is estimated that there are 25,000 living patients with cystic fibrosis in the United States. With our present treatment we know that the average duration of life will continue to grow longer and that more than the present 10 per cent will live to adult life.