1. Centers for Disease Control and Prevention. Prevention and control of seasonal influenza with vaccines. Recommendations of the Advisory Committee on Immunization Practices-United States, 2013–2014. MMWR Recomm Rep. 2013;62(RR-07):1–43.
2. Vaccines against influenza WHO position paper – November 2012;World Health Organization;Wkly Epidemiol Rec,2012
3. World Health Organization. Prevention_and_control_of_influenza_pandemics. [cited 2016 Mar 2].
4. VENICE II Consortium. Vaccination coverage assessment in EU/EEA; 2011. [cited 2016 Mar 1].
5. Prevention and control of seasonal influenza with vaccines: recommendations of the Advisory Committee on Immunization Practices (ACIP) – United States, 2014–15 influenza season;Grohskopf;MMWR Morb Mortal Wkly Rep,2014