The Swine Flu virus is a virus that has brought with it a lot of confusion and even scientists are unsure of its exact origin.

The virus is believed to have mutated from pigs and at some point was transmitted to humans with the possibility that the virus is a mixture of avian, swine and human viruses.

Southern California and Texas, similar to the strains found in Mexico.

Although swine flu has been known to sporadically infect people, it has usually occurred in rare cases in which the virus jumps from swine to humans who are directly exposed to the animals, such as pig farmers.