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  • Influenza (Flu) | CDC - Centers for Disease Control and Prevention

    http://www.cdc.gov/flu/

    2 days ago ... While H3N2 viruses predominated earlier in the season, influenza B viruses have
    been more common in recent weeks. This season has been ...

  • Influenza (flu) Definition - Diseases and Conditions - Mayo Clinic

    http://www.mayoclinic.org/diseases-conditions/flu/basics/definition/co...

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

  • Influenza - Wikipedia, the free encyclopedia

    http://en.wikipedia.org/wiki/Influenza

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

  • Influenza (Seasonal Flu)-Topic Overview - WebMD

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

    Influenza (flu) is a viral infection. People often use the term "flu" to describe any
    kind of mild illness, such as a cold or a stomach virus, that has symptoms like the
     ...

  • What is flu? What is influenza? What are the symptoms of flu ...

    http://www.medicalnewstoday.com/articles/15107.php

    Sep 10, 2014 ... Influenza, or flu, is a respiratory illness that is caused by a virus. Flu is highly
    contagious and is usually spread by the coughs and sneezes of a ...

  • WHO | Influenza (Seasonal)

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

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

  • Influenza - American Lung Association

    http://www.lung.org/lung-disease/influenza/

    Influenza, or flu, is a serious respiratory illness. It is easily spread from person to
    person and can lead to severe complications, even death.

  • The 1918 Influenza Pandemic - virus

    https://virus.stanford.edu/uda/

    History of this pandemic, the public health measures taken to limit it, and the
    efforts of scientists to pinpoint its cause.

  • Flu: MedlinePlus

    http://www.nlm.nih.gov/medlineplus/flu.html

    Flu (Influenza) From the National Institutes of Health ... in Spanish · Key Facts
    about Influenza (Flu) and Flu Vaccine(Centers for Disease Control and
    Prevention) ...

  • Flu.gov: Home

    http://www.flu.gov/ - 20 hours ago

    Get the seasonal and pandemic flu information you need at Flu.gov.