Influenza Testing for Novel Influenza and Variant Influenza A Viruses

The 2025 city and county fairs and agricultural events season in Wisconsin is underway. During recent seasons, swine exhibitions at agricultural fairs and other direct or indirect exposure to swine have been associated with human infections caused by variant influenza A viruses that include influenza A(H3N2)v, A(H1N2)v, and A(H1N1)v.