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Flu; Flu / Influenza; Grippe; Influenza (Flu); Influenza and Colds 

 

Influenza, or flu, is a respiratory infection caused by a variety of flu viruses. The most familiar aspect of the flu is the way it can "knock you off your feet" as it sweeps through entire communities.
The flu differs in several ways from the common cold, a respiratory infection also caused by viruses. For example, people with colds rarely get fevers or headaches or suffer from the extreme exhaustion that flu viruses cause.
The Centers for Disease Control and Prevention (CDC) esti...

Atypical pneumonia is a term used to describe a form of pneumonia not caused by one of the more traditional pathogens.


Influenza as related to Atypical pneumonia