1. Centers for Disease Control and Prevention. Influenza activity--United States, 2012–13 season and composition of the 2013–14 influenza vaccine. MMWR Morb Mortal Wkly Rep. 2013;62(23):473–9.
2. Centers for Disease Control and Prevention. Update: influenza activity - United States, 2011–12 season and composition of the 2012–13 influenza vaccine. MMWR Morb Mortal Wkly Rep. 2012;61(22):414–20.
3. Epperson S, Blanton L, Kniss K, Mustaquim D, Steffens C, Wallis T, et al. Influenza activity - United States, 2013–14 season and composition of the 2014–15 influenza vaccines. MMWR Morb Mortal Wkly Rep. 2014;63(22):483–90.
4. Centers for Disease Control and Prevention: FluView Interactive [
http://www.cdc.gov/flu/weekly/fluviewinteractive.htm
] (2014). Accessed 8/11/2014.
5. Centers for Disease Control and Prevention: Overview of Influenza Surveillance in the United States [
http://www.cdc.gov/flu/weekly/overview.htm
] (2014). Accessed 9/25/2014.