Swine FLU- All about Swine flu: This section provides you with the latest articles and information on swine flu. Swine flu is a respiratory disease caused by virus commonly found in pigs. Swine flu is also known as Swine Influenza and H1N1 flu. Most commonly swine flu is due to H1N1 influenza subtype but sometimes it may be a result of other subtypes, such as H1N2, H3N1, and H3N2. Get the facts on swine flu, its symptoms, how this contagious infection is transmitted, diagnosis, treatment and prevention through vaccine.