There is no cure for asthma and Downham knows it will always be a daily part of his life. When he grows up he wants to be a carpenter, even though sawdust irritates his asthma. More than 17 million people have asthma, which is a chronic lung disease. Airways become sensitive to infection, weather, exercise, irritants from dust, vapors, smoke, mold, animals, air pollution, stress or allergens. Lung airways swell and narrow.
Extra mucus clogs the airways.
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