1. CDC Vaccine Price List (CDC, 2018);
https://www.cdc.gov/vaccines/programs/vfc/awardees/vaccine-management/price-list/index.html
2. Vaccine Effectiveness—How Well Does the Flu Vaccine Work? (CDC, 2017);
https://www.cdc.gov/flu/about/qa/vaccineeffect.html
3. Advisory Committee on Immunization Practices (ACIP) Recommendations and Immunization Schedules (CDC, 2012);
http://www.cdc.gov/vaccines/acip/recs/index.html
4. Flu Vaccination Coverage, United States, 2015–16 Influenza Season (CDC, 2016);
https://www.cdc.gov/flu/fluvaxview/coverage-1516estimates.html
5. Briss, P. A. et al. Reviews of evidence regarding interventions to improve vaccination coverage in children, adolescents, and adults. The task force on community preventive services. Am. J. Prev. Med. 18, 97–140 (2000).