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| Asthma is characterized by recurrent episodes of wheezing, shortness of breath, chest tightness, and coughing.[17] Sputum may be produced from the lung by coughing but is often hard to bring up |
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| Asthma is characterized by recurrent episodes of wheezing, shortness of breath, chest tightness, and coughing.[17] Sputum may be produced from the lung by coughing but is often hard to bring up |
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