Several theories try to explain why we cough when we have the flu or common cold.
Coughing is a normal reflex to clear the airway of small particles, microorganisms, mucus, or food or drinks accidentally going down “the wrong pipe.” But when we are plagued with a pesky cold or flu infection, cough takes on a new dimension.
What often starts as a tickle in the throat at the first sign of an upper respiratory tract infection can easily turn into a full-blown dry cough, most likely followed by a hacking, mucus-producing cough that can be very uncomfortable.
Why do we cough when we have a flu or cold infection? We examine what research has revealed about the mechanisms behind cough and who benefits: the virus, or us?
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