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In page Cystic fibrosis:

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Chronic illnesses can be difficult to manage. CF is a chronic illness that affects the "digestive and respiratory tracts resulting in generalized malnutrition and chronic respiratory infections".[1] The thick secretions clog the airways in the lungs, which often cause inflammation and severe lung infections.[2][3] If it is compromised, it affects the quality of life of someone with CF and their ability to complete such tasks as everyday chores.[citation needed]