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A cough is a sudden expulsion of air through the large Breathing passages that can help clear them of fluids, irritants, foreign particles and microbes. As a protective reflex, coughing can be repetitive with the cough reflex following three phases: an Inhalating, a forced Exhalating against a closed glottis, and a violent release of air from the lungs following opening of the glottis, usually accompanied by a distinctive sound.[from Wikipedia]
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