1. Housworth, J, Langmuir, AD. Excess mortality from epidemic influenza, 1957–1966. American Journal of Epidemiology 1974; 100: 40–48.
2. Glezen, WP. Serious morbidity and mortality associated with influenza epidemics. Epidemiologic Reviews 1982; 4: 25–44.
3. Lui, KJ, Kendal, AP. Impact of influenza epidemics on mortality in the United States from October 1972 to May 1985. American Journal of Public Health 1987; 77: 712–716.
4. Thompson, WW, et al. Influenza-associated hospitalizations in the United States. Journal of the American Medical Association 2004; 292: 1333–1340.
6. Lee, JY, et al. National surveillance of influenza outbreak during winter of 1997 and 1998 in Korea. Korean Journal of Infectious Diseases 1999; 31: 1–8.
7. National Institute of Health, Korea. The revision of the infectious disease control law and the future. Communicable Diseases Monthly Report 2000; 11: 123–130.
8. Centers for Disease Control and Prevention. Update: influenza activity – United States and worldwide, 2000–01 season, and composition of the 2001–02 influenza vaccine. Morbidity and Mortality Weekly Report 2001; 50: 466–470.
9. Centers for Disease Control and Prevention. Influenza activity – United States, 2000–01 season. Morbidity and Mortality Weekly Report 2001; 50: 207–209.
10. Manuguerra, JC, Mosnier, A, Paget, WJ [EISS (European Influenza Surveillance Scheme)]. Monitoring of influenza in the EISS European network member countries from October 2000 to April 2001. Eurosurveillance 2001; 6: 127–135.
12. Fleming, DM, et al. The duration and magnitude of influenza epidemics: a study of surveillance data from sentinel general practices in England, Wales and the Netherlands. European Journal of Epidemiology 1999; 15: 467–473.
13. Glezen, WP, et al. Epidemiologic observations of influenza B virus infections in Houston, Texas, 1976–1977. American Journal of Epidemiology 1980; 111: 13–22.
14. Nicholson, KG. Epidemiology of influenza. In: Nicholson, KG, Hay, AJ, Webster, RG eds. Textbook of Influenza. Oxford: Blackwell Science, 1998, pp. 181–206.
15. Aymard, M, et al. Epidemiology of viral infections and evaluation of the potential benefit of OM-85 BV on the virologic status of children attending day-care centers. Respiration 1994; 61 (Suppl. 1): 24–31.
16. Carman, WF, et al. Rapid virological surveillance of community influenza infection in general practice. British Medical Journal 2000; 321: 736–737.
17. Curran, M, Hampson, A. National influenza surveillance 1997. Communicable Diseases Intelligence 1998; 22: 69–74.
18. Tillett, HE, Smith, JW, Gooch, CD. Excess deaths attributable to influenza in England and Wales: age at death and certified cause. International Journal of Epidemiology 1983; 12: 344–352.
19. Barker, WH. Excess pneumonia and influenza associated hospitalization during influenza epidemics in the United States, 1970–78. American Journal of Public Health 1986; 76: 761–765.
20. Oshitani, H. Further development of influenza surveillance in China and global impact on influenza control. In: Osterhaus, ADME, Cox, N, Hampson, AW eds. Options for the Control of Influenza IV: Proceedings of the World Congress on Options for the Control of Influenza IV, Crete, Greece, 23–28 September 2000. Amsterdam: Elsevier, 2001, pp. 119–122.
21. Chan, PK. Outbreak of avian influenza A(H5N1) virus infection in Hong Kong in 1997. Clinical Infectious Diseases 2002; 34 (Suppl. 2): S58–64.
22. Lipatov, AS, et al. Influenza: emergence and control. Journal of Virology 2004; 78: 8951–8959.