USNEWS.com is reporting that 12 people living in Indiana, Iowa, Maine, Pennsylvania, and West Virginia.
A report from the Centers for Disease Control say “an influenza A (H1N1) virus that is known to circulate in U.S. swine but not humans has been detected in an adult in the state of Wisconsin. The patient reported occupational contact with swine prior to illness onset. No human-to-human transmission with this virus has been identified.The virus identified in Wisconsin has genes from avian, swine and human influenza viruses, making it a so-called “triple reassortant” (tr) virus. Triple reassortant viruses have been circulating in U.S. swine since the 1990s. However the virus detected in Wisconsin is different from earlier triple reassortant influenza A H1N1 viruses in swine (tr-H1N1) in that it has acquired the matrix [M] gene) from the 2009 influenza A (H1N1) virus.”