1. Korean Society of Infectious Diseases. Vaccination for adult. 2007. Seoul, Korea: Goonja publication.
2. Centers for Disease Control and Prevention (CDC). Recommended adult immunization schedule--United States, 2011. MMWR Morb Mortal Wkly Rep. 2011. 60:1–4.
3. Ball P. Epidemiology and treatment of chronic bronchitis and its exacerbations. Chest. 1995. 108:2 Suppl. 43S–52S.
4. Sapey E, Stockley RA. COPD exacerbations. 2: aetiology. Thorax. 2006. 61:250–258.
5. Neuzil KM, Reed GW, Mitchel EF Jr, Griffin MR. Influenza-associated morbidity and mortality in young and middle-aged women. JAMA. 1999. 281:901–907.
6. Wilde JA, McMillan JA, Serwint J, Butta J, O'Riordan MA, Steinhoff MC. Effectiveness of influenza vaccine in health care professionals: a randomized trial. JAMA. 1999. 281:908–913.
7. Nichol KL, Wuorenma J, von Sternberg T. Benefits of influenza vaccination for low-, intermediate-, and high-risk senior citizens. Arch Intern Med. 1998. 158:1769–1776.
8. Nichol KL, Baken L, Nelson A. Relation between influenza vaccination and outpatient visits, hospitalization, and mortality in elderly persons with chronic lung disease. Ann Intern Med. 1999. 130:397–403.
9. Song JY, Cheong HJ, Hwang IS, Choi WS, Jo YM, Park DW, et al. Long-term immunogenicity of influenza vaccine among the elderly: risk factors for poor immune response and persistence. Vaccine. 2010. 28:3929–3935.
10. Fiore AE, Uyeki TM, Broder K, Finelli L, Euler GL, Singleton JA, et al. Prevention and control of influenza with vaccines: recommendations of the Advisory Committee on Immunization Practices (ACIP), 2010. MMWR Recomm Rep. 2010. 59:1–62.
11. Nichol KL, Baken L, Wuorenma J, Nelson A. The health and economic benefits associated with pneumococcal vaccination of elderly persons with chronic lung disease. Arch Intern Med. 1999. 159:2437–2442.
12. Nichol KL. The additive benefits of influenza and pneumococcal vaccinations during influenza seasons among elderly persons with chronic lung disease. Vaccine. 1999. 17:Suppl 1. S91–S93.
13. Schenkein JG, Nahm MH, Dransfield MT. Pneumococcal vaccination for patients with COPD: current practice and future directions. Chest. 2008. 133:767–774.
14. Jackson LA, Neuzil KM, Yu O, Benson P, Barlow WE, Adams AL, et al. Effectiveness of pneumococcal polysaccharide vaccine in older adults. N Engl J Med. 2003. 348:1747–1755.
15. Schenkein JG, Nahm MH, Dransfield MT. Pneumococcal vaccination for patients with COPD: current practice and future directions. Chest. 2008. 133:767–774.
16. Furumoto A, Ohkusa Y, Chen M, Kawakami K, Masaki H, Sueyasu Y, et al. Additive effect of pneumococcal vaccine and influenza vaccine on acute exacerbation in patients with chronic lung disease. Vaccine. 2008. 26:4284–4289.
17. Park WB, Park SW, Kim HB, Kim EC, Oh M, Choe KW. Pertussis in adults with persistent cough in South Korea. Eur J Clin Microbiol Infect Dis. 2005. 24:156–158.