1. CDC. Prevention and control of influenza, recommendations of the Advisory Control Committee on Immunization Practices (ACIP). USA: CDC; 2005.
2. Engin A. Influenza type A (H5N1) virus infection. Mikrobiyol Bul 2007; 41: 485–494.
3. Osztovits J, Balázs C, Fehér J. H1N1 influenza –pandemic, 2009. Orv Hetil 2009; 150: 2265–2273.
4. World Health Organization (WHO). WHO report. Volume 4, Issue 25, Sunday 19 June 2011.
5. Ministry of Health (MOH). Preventive sector, report on pandemic influenza. Ministry of Health at EGYPT: MOH; 2011.