Swine influenza
Swine influenza (also called swine flu, hog flu, and pig flu)
is an infection by any one of several types of swine influenza
virus. Swine influenza virus (SIV) is any
strain of the
influenza family of viruses that is
endemic in
pigs.[2]
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 throughout pig populations
worldwide. Transmission of the virus from pigs to humans is not common and does
not always lead to
human influenza, often resulting only in the
production of
antibodies in the blood. If transmission does
cause human influenza, it is called
zoonotic swine flu. People with regular
exposure to pigs are at increased risk of swine flu infection. The meat of an
infected animal poses no risk of infection when properly cooked.
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