What is cystic fibrosis?

Cystic fibrosis is a genetic disease that causes mucus in the body to become thick and sticky. This glue-like mucus builds up and causes problems in many of the body's organs, especially the lungs and the pancreas. People who have cystic fibrosis can have serious breathing problems and lung disease. They can also have problems with nutrition, digestion, and growth. The disease generally gets worse over time, but the life expectancy for people with cystic fibrosis has been steadily increasing.

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