Bronchitis is an inflammation of the bronchial tubes, the airways that carry air to your lungs. It causes a cough that often brings up mucus. It can also cause shortness of breath, wheezing, a low fever, and chest tightness. Acute bronchitis is usually caused by an infection, most often; a virus. 

 

There are two types of bronchitis: acute and chronic.

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For More Information on Acute Bronchitis

--look here for MedlinePlus information

--look here for FamilyDoctor.org information

--look here for information on Chronic Bronchitis (chronic bronchitis is a cough that lasts for more then two weeks multiple times through the year). Chronic Bronchitis is a form of COPD.