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What is the flu?

Influenza, or the flu, is a common viral infection.

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About this article

Author: Dr Joanne Van der Velden PhD, BSc (Hons)
First answered: 18 Sep 2014
Last reviewed: 19 May 2018
Rating: 4.2 out of 5
Votes: 295 (Click smiley face below to rate)
Category: Bronchitis


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