A dry, nonproductive cough that sounds like a bark is likely a sign of:

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Bronchitis is inflammation of the bronchi that may cause a dry, nonproductive cough that sounds like a bark. Influenza is an acute respiratory infection caused by the influenza virus, characterized by a sore throat and dry cough. Pneumonia causes the alveoli to fill with fluid and pus, which prevents air from entering the alveoli and has a productive cough. Pleurisy is the inflammation of the lining that lines the lungs.

A Dry, Nonproductive Cough That Sounds Like a Bark Is