A 45-year-old woman presents to urgent care with a persistent productive cough for the past few months. Over the past week, she has noticed more sputum production, which is thick and dark in color, as well as fatigue and dyspnea on exertion. She denies fevers, pharyngitis, abdominal pain, or gastrointestinal upset. She denies tobacco use or occupational exposures to any inhaled chemicals. Physical exam reveals that the patient is afebrile with vital signs within normal …
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