1. WHO/CDC. Influenza pandemic handbook for journalists; 2005 http://www.who.int/csr/don/Handbook_influenza_pandemic_dec05.pdf. P.2 [Last visited 2010.1.10].
2. WHO. Influenza (Seasonal); 2009. http://www.who.int/mediacentre/factsheets/fs211/en/ [Last visited 2010.1.10].
3. CDC. Vaccine information statement (Interim) Inactivate influenza vaccine; 2009. http://www.cdc.gov/vaccines/pubs/vis/downloads/vis-flu.pdf [Last visited 2010.1.10].
4. CDC. Prevention and control of influenza: recommendations of the Advisory Committee on Immunization Practices [ACIP]. MMWR 2006/55(RR10):1–42. also see http://www.cdc.gov/mmwr/preview/mmwrhtml/rr5510a1.htm#top. Last visited 2010.1.10.
5. Canadian Immunization Guide (Seventh Edition); 2006. The National Advisory Committee on Immunization (NACI). http://www.phac-aspc.gc.ca/publicat/cig-gci/p04-inf-eng.php [Last visited 2010.1.10].