1. Ten great public health achievements—United States, 2001-2010;Centers for Disease Control and Prevention;MMWR Morb Mortal Wkly Rep,2011
2. Historical comparisons of morbidity and mortality for vaccine-preventable diseases in the United States;Roush;JAMA,2007
3. 2020 Topics and objectives: immunizations and infectious diseases. 2014. Available at: http://www.healthypeople.gov/2020/topicsobjectives2020/objectiveslist.aspx?topicId=23. Accessed January 2, 2014.
4. Facts about adult immunization. 2009. Available at: http://www.nfid.org/publications/factsheets/adultfact.pdf. Accessed December 30, 2013.
5. Pneumococcal disease. 2014. Available at: http://www.adultvaccination.com/vpd/pneumococcal. Accessed January 3, 2014.