We understand from CDC report that H1N1 virus otherwise called the swine flu virus since it was learnt from the laboratory studies that this virus was having the many genes that normally very similar to those of the influenza viruses that belongs to viruses of the pigs in North America. But later studies confirmed that this swine flu virus turned out to be the virus having different genes from pig, bird and human influenza viruses.

It has become in practice that both the swine flu virus (H1N1) and the illness or the disease are generally called as swine flu virus and swine flu by common people and media. Researchers follow the term to swine flu virus as H1N1 virus. In the same way WHO call and refer the swine flu virus as H1N1 virus only.

It is stated that one will not fall in the swine flu illness by eating pork though this virus is having one genetic component from pig influenza.

A combination of genetic materials from swine flu influenza, bird flu influenza and human influenza made this new virus and humans are not exposed to this flu so far and hence the pandemic occurred in 2009