Swine flu is a respiratory infection caused by Influenza type A virus. The strain of the virus causing the infection has been reported to be very different from that of seasonal flu. Referred to as the 2009 H1N1, his virus is said to contain the genes from pigs, humans and birds. It has been reported to get transmitted from human to human. Symptoms are same as seasonal flu. Diarrhea and vomiting might also be seen