SwineFlu Influenza H1N1 Mechanism of Action MOA Animation
CDC H1N1 (Swine Flu) Response Actions and Goals
H1N1 Flu Virus Spreads to More Countries
Swine influenza is an infection caused by any one of several types of swine influenza viruses. Swine influenza virus (SIV) or swine-origin influenza virus (S-OIV) is any strain of the influenza family of viruses that is endemic in pigs. As of 2009, the known SIV strains include influenza C and the subtypes of influenza A known as H1N1, H1N2, H2N1, H3N1, H3N2, and H2N3.