Fast, shallow breathing, wet, wheezy cough are symptoms of Bronchitis which is when Inflammation of the airways causes them to narrow and secrete thick mucus, or phlegm, which clogs the small airways, causing the characteristic cough of bronchitis, wheezing, and shortness of breath. When contracting this, it leaves you to be more susceptible to Pneumonia
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If the infection goes untreated it can travel from the airways into the lungs, which leads to pneumonia