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Influenza (flu) Causes - Diseases and Conditions - Mayo Clinic - 0 views

www.mayoclinic.org/...con-20035101 causesofinfluenza
shared by cwilson817 on 04 Sep 14 - No Cached
  • Flu viruses travel through the air in droplets when someone with the infection coughs, sneezes or talks.
    • cwilson817
      cwilson817 on 09 Sep 14
       
      Flu viruses travel through the air in droplets when someone with the infection coughs,sneezes or talks
  • If future influenza viruses are similar to those you've encountered before, either by having the disease or by vaccination, those antibodies may prevent infection or lessen its severity.
  • A number of virus subtypes have appeared in humans since the global epidemic (pandemic) of 1918, which killed tens of millions of people.
  • cwilson817 on 09 Sep 14
     
    influenza (flu) causes
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Types of Influenza Viruses | About (Flu) | CDC - 0 views

www.cdc.gov/...types.htm typesofinfluenzaviruses
shared by cwilson817 on 09 Sep 14 - No Cached
  • There are three types of influenza viruses: A, B and C.
  • Human influenza A and B viruses cause seasonal epidemics of disease almost every winter in the United States.
  • emergence of a new and very different influenza virus to infect people can cause an influenza pandemic
  • ...7 more annotations...
  • Influenza type C infections cause a mild respiratory illness and are not thought to cause epidemics.
  • The new virus caused the first influenza pandemic in more than 40 years.
  • the hemagglutinin (H) and the neuraminidase (N). There are 18 different hemagglutinin subtypes and 11 different neuraminidase subtypes. (H1 through H18 and N1 through N11 respectively.)
  • This virus was very different from the human influenza A (H1N1) viruses circulating at that time
  • Current subtypes of influenza A viruses found in people are influenza A (H1N1) and influenza A (H3N2) viruses.
  • Influenza B viruses are not divided into subtypes
  • further broken down into lineages and strains. Currently circulating influenza B viruses belong to one of two lineages: B/Yamagata and B/Victoria.
  • cwilson817 on 09 Sep 14
     
    Influenza 2
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