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What is cystic fibrosis, exactly?

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Cystic fibrosis is a genetic condition mostly affecting the lungs and digestive system. You are born with cystic fibrosis and cannot catch it later in life, but one in 25 of us carries the faulty gene that causes it, usually without even knowing. Presented by Charles Michael Duke. Join the fight for a Life Unlimited by cystic fibrosis. Visit