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What Is Cystic Fibrosis?

Cystic Fibrosis

Say: SIS-tik fi-BRO-sus

You may know that you have mucus in your nose, mouth, and lungs, and that it helps keep you healthy. But kids with the condition cystic fibrosis have bodies that make thick, sticky mucus. This causes problems in their lungs and their digestive tract. The condition makes it hard for them to breathe and also to get the nutrition they need from their food.

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