Story Summary:…Between the 1930s and the 1990s, the most commonly circulating swine influenza virus among pigs-classical swine influenza A, known as H1N1-underwent little change….Influenza viruses have the ability to exchange these segments, creating new genetically different viruses….ARS researchers tested serum samples from pigs previously infected with U. S swine influenza viruses or vaccinated with commercial vaccines to determine if U. S commercial swine herds are susceptible to the new swine origin (S/O) H1N1 influenza virus….ARS Swine Influenza Research Program The ARS research program focuses on tracking the evolution of swine influenza viruses and their potential impact on the swine industry….Read the Full Story

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