1. Amies, N. (2010). Experts defend scientific community over claims of swine flu exaggeration. Retrieved from: http://www.dw.de/experts-defend-scientific-community-over-claims-of-swine-flu-exaggeration/a-4901330
2. Catastrophe risk
3. Department of Defense influenza and other respiratory disease surveillance during the 2009 pandemic
4. Chan, M. (2009a, April 29).Influenza A (H1N1). Statement by WHO Director-General, Dr Margaret Chan. Retrieved from http://www.who.int/mediacentre/news/statements/2009/h1n1_20090429/en/index.html