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Swine influenza virus (SIV) or swine-origin influenza virus (S-OIV) refers to any strain of the influenza family of viruses that is endemic in pigs. [2] As of 2009, identified SIV strains include influenza C and the subtypes of influenza A known as H1N1 , H1N2 , H2N1, H3N1 , H3N2 , and H2N3 .
The virus is a novel strain of the influenza virus, [2] for which existing vaccines against seasonal flu provided no protection. A study at the U.S. Centers for Disease Control and Prevention (CDC) published in May 2009 found that children had no preexisting immunity to the new strain but that adults, particularly those over 60, had some degree of immunity.
The strain of influenza, called H1N2, is similar to flu viruses circulating in pigs in the UK, but this is the first detection of this strain of flu in a human in the UK.
Influenza A(H1N2)v is similar to flu viruses currently circulating in pigs in the UK. Skip to main content. 24/7 Help. For premium support please call: 800-290-4726 more ways to ...
Influenza, commonly known as the flu, is an infectious disease caused by influenza viruses.Symptoms range from mild to severe and often include fever, runny nose, sore throat, muscle pain, headache, coughing, and fatigue.
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The 2009 swine flu pandemic, caused by the H1N1/swine flu/influenza virus and declared by the World Health Organization (WHO) from June 2009 to August 2010, was the third recent flu pandemic involving the H1N1 virus (the first being the 1918–1920 Spanish flu pandemic and the second being the 1977 Russian flu).
There are four different types of influenza virus: A, B, C, and D. Influenza C usually causes only mild illness while D mostly affects animals, especially cattle.