A patient reports severe dyspnea.Follow-up questions indicate a history of few respiratory infections,no persistent cough,and scanty sputum.Which of the following respiratory diseases is most likely?

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Severe dyspnea with a history of few respiratory infections, no persistent cough, and scanty sputum are typical features of emphysema. Asthma is characterized by wheezing, cough, and variable dyspnea; Cystic fibrosis is a genetic disorder resulting in chronic lung infections, obstructive lung disease, and pancreatic insufficiency; Chronic bronchitis presents with cough, sputum production, and dyspnea; Tuberculosis is characterized by cough, sputum production, and occasionally hemoptysis.

A Patient Reports Severe Dyspnea