1. Prevention and control of seasonal influenza with vaccines: recommendations of the advisory committee on immunization practices (ACIP), 2009;Centers for Disease Control and Prevention (CDC);MMWR,2009
2. Prevention and control of seasonal influenza with vaccines: recommendations of the advisory committee on immunization practices (ACIP), 2004;Centers for Disease Control and Prevention (CDC);MMWR,2004
3. Prevention and control of seasonal influenza with vaccines: recommendations of the advisory committee on immunization practices (ACIP), 2006;Centers for Disease Control and Prevention (CDC);MMWR,2006
4. The behavioral risk factor surveillance system (BRFSS);Centers for Disease Control and Prevention (CDC),2010
5. National health interview survey;Centers for Disease Control and Prevention (CDC),2010