1. Interim results: state-specific influenza A (H1N1) 2009 monovalent vaccination coverage – United States, October 2009–January 2010;Centers for Disease Control and Prevention;MMWR Morb Mortal Wkly Rep,2010
2. The Henry J. Kaiser Family Foundation – Statehealthfacts.org. 50 state comparisons. Available from: http://www.statehealthfacts.org/compare.jsp [cited 2010 July 12].
3. National and states population estimates;U.S. Census Bureau,2009
4. Centers for Disease Control and Prevention. FOIA Request, H1N1 Shipments through December 9, 2009. 2009 Provided December 17.
5. Centers for Disease Control and Prevention. Influenza-like Illness Surveillance Program (ILINet). 2010 Provided July 7.