1. CDC. Influenza (flu): influenza A (H3N2) variant virus. CDC recommendations for people at high risk. Atlanta, GA: US Department of Health and Human Services, CDC; 2016. https://www.cdc.gov/flu/swineflu/h3n2v-cases.htm
2. Animal and Plant Health Inspection Service, US Department of Agriculture. National surveillance plan for swine influenza virus in pigs. Washington, DC: US Department of Agriculture, Animal and Plant Health Inspection Service; 2010. https://www.aphis.usda.gov/animal_health/animal_dis_spec/swine/downloads/appendix_a_national_surv_plan.pdf
3. GenBank.;Benson;Nucleic Acids Res,2017
4. Update: influenza activity—United States and worldwide, May 21–September 23, 2017.;Blanton;MMWR Morb Mortal Wkly Rep,2017
5. Update: influenza A (H3N2)v transmission and guidelines—five states, 2011.;CDC;MMWR Morb Mortal Wkly Rep,2012