Swine influenza is an acute respiratory disease caused by influenza A viruses that circulate among pigs. The morbidity rate is usually high, and the case fatality rate low, but more severe outbreaks may be seen, and reduced growth rates in young pigs can cause economic losses
Iowa State University
Iowa State University Center for Food Security and Public Health, "Swine Influenza" (2016). Center for Food Security and Public Health Technical Factsheets. 129.