4R Nerome, K Nerome, N Tanabe, et al. Perspectives on the characteristics and achievements of recent surveillance of influenza activity in Japan[J]. Vaccine, 2002, 20 (suppl 2) :s36 - s43.
6Centers for Disease Control and Prevention. 2003 - 04 U. S. Influenza Season Summary[ EB]. http://www. cdc. gov/flu/weekly/weeklyarchives2003 - 2004/03 - 04summary. htm.
7Brown EL, Hampson WA, Webster GR1. Options for the Control of Influenza Ⅲ[M]. Amsterdam: ELSEVIER Science BV, 1996, 85-89.
8World Health Organization. Confirmed human cases of avian influenza A (H5N1)[EB]. http://www. who. int/csr/disease/avian-influenza/country/cases-table-2004-09-07/en.
9World Health Organization. Influenza A(H9N2) in Hong Kong Special Administrative Region of China ( SAR ) [ EB ]. http://www.who. int/csr/don/2003-12-10/en.
10M Koopmans, B Wilbrink, M Conyn, et al. Transmission of H7N7 avian influenza A virus to human beings during a large outbreak in commercial poultry farms in the Netherlands[J ]. The Lancet, 2004,363(9409) :587 - 593.
