1. Key Facts About Seasonal Influenza (Flu). [ http://www.cdc.gov/flu/about/disease/index.htm ]
2. Updated CDC Estimates of 2009 H1N1 Influenza Cases, Hospitalizations and Deaths in the United States, April 2009 - April 10, 2010. [ http://www.cdc.gov/h1n1flu/estimates_2009_h1n1.htm ]
3. Smith DJ: Predictability and Preparedness in Influenza Control. Science. 2006, 312 (5772): 392-394. 10.1126/science.1122665.
4. Fiore AE, Shay DK, Haber P, Iskander J, Uyeki T, Mootrey G, Bresee JS, Cox NJ: Prevention and control of influenza: Recommendations of the Advisory Committee on Immunization Practices (ACIP). Morbidity and Mortality Weekly Report. 2007, 56: 1-54.
5. Kelso JK, Milne GJ, Kelly H: Simulation suggests that rapid activation of social distancing can arrest epidemic development due to a novel strain of influenza. BMC Public Health. 2009, 9 (1): 117-10.1186/1471-2458-9-117.