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Swine influenza

Swine_flu

Swine influenza (also called H1N1 flu, swine flu, hog flu, and pig flu) is an disease by any one of different types of swine influenza virus. Swine influenza virus (SIV) is any damage of the influenza family of viruses that is endemic in pigs. As of 2009, the known SIV strains include influenza C and the subtypes of influenza A known as H1N1, H1N2, H3N1, H3N2, and H2N3.

Swine influenza virus is common during pig populations worldwide. Transmission of the virus from pigs to humans is not common and does not always direct to human influenza, often resultant only in the production of antibodies in the blood. If transmission does cause human influenza, it is called zoonotic swine flu. People with regular disclosure to pigs are at increased risk of swine flu virus. The meat of an infected animal poses no risk of infection when correctly cooked.

During the mid-20th century, recognition of influenza subtypes became possible, allowing accurate diagnosis of transmission to humans. Since then, only 50 such transmissions have been definite. These strains of swine flu rarely pass from human to human. Symptoms of zoonotic swine flu in humans are comparable to those of influenza and of influenza-like illness in general, namely chills, fever, sore throat, muscle pains, severe headache, coughing, weakness and general discomfort.