6Webby RJ, Webster RG. Are we ready for pandemic influenza [J]? Science, 2003, 302 (5650): 1519-1522.
7Oxford JS. Influenza A pandemics of the 20th century with special reference to 1918: virology, pathology and epidemiology [J]. Rev Med Virol, 2000, 10 (2): 116-133.
8Taubenberger JK, Morens DM. 1918 Influenza: the Mother of All Pandemics[J]. Emerglnfeet Dis, 2006, 12 (1) 15-22.
9Potter CW. A history of influenza [J]. J Appl Mierobiol, 2001, 91 (4) : 572-579.