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What Is Influenza?
Influenza is a specific family of viruses that affects birds and mammals, and it can lead to pneumonia, sinusitis and ear infection. Find out why it's impossible to develop a lifelong immunity to influenza with help from a practicing pediatrician in this... More »
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Source: www.ehow.com

en.wikipedia.org/wiki/Influenza

Influenza, commonly known as "the flu", is an infectious disease caused by an influenza virus. Symptoms can be mild to severe. The most common symptoms ...

www.cdc.gov/flu/keyfacts.htm

Aug 25, 2016 ... The flu is a contagious respiratory illness caused by influenza viruses that infect the nose, throat, and lungs. It can cause mild to severe illness, ...

www.cdc.gov/flu

There are many different influenza A viruses; some are found in humans and others in animals such as avian flu in birds and poultry. Avian influenza A viruses  ...

www.mayoclinic.org/diseases-conditions/flu/home/ovc-20248057

Oct 20, 2016 ... Influenza is a viral infection that attacks your respiratory system — your nose, throat and lungs. Influenza, commonly called the flu, is not the ...

www.nfid.org/idinfo/influenza

Influenza, more commonly referred to as "flu," impacts people of all ages. Influenza is a highly contagious viral infection of the nose, throat, and lungs that occurs ...

www.who.int/mediacentre/factsheets/fs211/en

WHO fact sheet on influenza: includes key facts, definition, symptoms, transmission, seasonal epidemics, effects, prevention, WHO response.

www.webmd.com/cold-and-flu/tc/influenza-topic-overview

Influenza (flu) is an illness caused by a virus that comes on suddenly, and causes symptoms such as fever, body aches, headache, fatigue, loss of appetite, a dry ...

www.medicalnewstoday.com/articles/15107.php

Jul 22, 2016 ... Influenza, or flu, is a respiratory illness caused by a virus. Flu is highly contagious and is normally spread by the coughs and sneezes of an ...

medlineplus.gov/flu.html

Do you know the difference between a cold and the flu (influenza)? Or looking for information on the "stomach flu?" Discover symptoms and treatment.