Swine flu is also known with various other names such as swine flu, hog flu, and pig flu and sometimes simply the swine. It is an infection by any one of several types of swine flu virus. Swine influenza virus (SIV) is any strain of the Orthomyxoviridae that is endemic in pigs. As of 2009, the known SIV strains include influenza C and the subtypes of this flu is a virus known as H1N1, H1N2, H3N1, H3N2, and H2N3. Swine flu virus is common throughout pig populations worldwide, but transmission of this virus from pigs to human is not so common, this type of virus had taken place recently with a bunch of people surviving. This virus was firstly transmitted from a pig to human and then human also infected other healthy people around themself, causing a chain of infection. 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, but if  transmission from pigs to human does cause human influenza, it is called zoonotic swine flu. People, who are living in near the pig farm, or people who are in rural areas where there are garbage easily available , we can find pigs roaming around and the chances of infection increases,  with the people who are regularly exposed to pigs . The meat of an infected animal poses no risk of infection when properly cooked.

Srains of swine flu rarely pass from human to human. Symptoms of zoonotic swine flu in humans are similar 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.

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