What is the cause of chronic bronchitis?
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the inflammation of the lining of the bronchial tubes which carries air from the lungs
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The Chronic Bronchitis is a kind of cough that generally occurs daily with the production of sputum.
It lasts for at least 3 months. Cigarette smoking is one of the main causes of the disease.
If the bronchial irritants are repeatedly inhaled by a person, it also can cause the disease.
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