1. WHO/GIP Data in HQ as of 02 May 2012[online] 2012 www.who.int/influenza/human_animal_interface
2. National Strategy for Pandemic Influenza United States Government, Washington, D.C., November 1, 2005[online] 2005 www.flu.gov/planning-preparedness
3. WHO Terms of Reference for National Influenza Centres [online] 2013 www.who.int/influenza/gisn_laboratory/national_influenza_centres/terms_of_reference_for_national_influenza_centres.pdf
4. Animal and Pandemic Influenza-A Framework for Sustaining Momentum, Fifth Global Progress Report, July 2010[online] 2010
5. World Health Organization Checklist for influenza pandemic preparedness planning. 2005 [online] 2005 www.who.int