swine influenza
Also known as pig influenza, swine flu, pig flu, hog flu, H1N1 Virus Infection, H1N1 Influenza, Influenza A (H1N1), H1N1 Flu
infection caused by any one of several types of swine influenza viruses
AI overview
Swine influenza is an infection caused by viruses that originate in pigs. It matters because these viruses can sometimes spread to humans, potentially causing illness in people.
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Article
Swine influenza is an infection caused by any of several types of swine influenza viruses. 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. 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 swine influenza virus is common throughout pig populations worldwide. Transmission of the virus from pigs to humans is rare and does not always lead to human illness, often resulting only in the production of antibodies in the blood. If transmission causes human illness, it is called a zoonotic swine flu. People with regular exposure to pigs are at increased risk of swine flu infections.