Recently swine flu has become a very powerful threat for the people all over the world. It is first diagnosed in Mexico and now it has spread in many parts of the world. Swine influenza which is also called swine flu, hog flu or pig flu is an infection of a host animal by any one of several specific types of microscopic organisms called swine flu virus. The outbreak of swine flu in 2009, known as six strains are the influenza c virus and the subtypes of the influenza a virus known as H1 N1 H1N1 H3N2 and N2N3. Swine influenza is common in pigs in the Midwestern United States, Mexico, Canada, South America, Europe, Kenya, mainland china, Taiwan, Japan, and other parts of eastern Asia. The origin of this new attain of virus is unknown. There are three types of influenza viruses that cause human flu; two also cause influenza in pigs, with influenza virus A being common in pigs and influenza virus c being rare. The 2009 flu outbreak is due to a new strain of subtype H1N1 not previously reported in pigs. In late April, Margaret Chan, the world health organization’s director general, declared a public health emergency of international concern under the rules of the WHO?s new international health regulations when the first cases of the H1N1verus were reported in the united states. Following the outbreak, on May 2, 2009, it was reported in pigs at a farm in Alberta, Canada, with a link to the outbreak in Mexico. The pigs are suspected to have caught this new strain virus from a farm worker who recently returned from Mexico, then showed symptoms of an influenza like illness. People who work with poultry and swine, especially people with intense exposures may be attacked with swine flu. In the present world swine flu has posed a great threat to the people of different countries. India is also in a vulnerable situation. It has already taken away many human lives. Even one India has died of this flu in Mexico. Hence, consciousness among the people must be developed by arranging seminars, conferences, meeting on it government should take initiative in this regard.