1. Robinson K, Baughman W, Rothrock G, et al: Epidemiology of invasive streptococcus pneumoniae infection in the United States, 1995–1998. JAMA. 2001, 285: 1729-35. 10.1001/jama.285.13.1729.
2. Centers for Disease Control and Prevention: Prevention of pneumococcal disease: recommendations of the Advisory Committee on Immunization Practices (ACIP). MMWR RR. 1997, 46: 1-24.
3. Healthy People 2010. 2000, US Department of Health and Human Services: Washington, DC
4. Centers for Disease Control and Prevention: Public health and aging: Influenza vaccination coverage among adults aged > 50 years and pneumococcal vaccination coverage among adults aged > 65–United States, 2002. MMWR. 2003, 52: 987-92.
5. O'Malley AS, Forrest CB: Immunizations and disparities in older Americans. Amer J Prev Med. 2006, 31: 150-158. 10.1016/j.amepre.2006.03.021.