1. World Health Organization Influenza Fact Sheet. Accessed July 1, 2014, at: http://www.who.int/mediacentre/factsheets/fs211/en/index.html.
2. Prevention and control of seasonal influenza with vaccines: Recommendations of the Advisory Committee on Immunization Practices (ACIP)—United States, 2014–15 influenza season;Grohskopf;Morb Mortal Wkly Rep,2014
3. Large-scale sequencing of human influenza reveals the dynamic nature ofviral genome evolution;Ghedin;Nature,2005
4. Santibanez TA, Zhai Y, O’Halloran A, Kahn K, Srivastav A, Lu PJ, Kennedy ED, Bridges CB, Williams WW, Greby SM, Singleton JA. Flu vaccination coverage, United States, 2012–13 influenza season. Accessed July 2014, http://www.cdc.gov/flu/fluvaxview/coverage-1213estimates.htm.
5. Survey of the prevalence of immunization non-compliance due to needle fears in children and adults;Taddio;Vaccine,2012