1. Influenza pandemics of the 20th century;Kilbourne;Emerg Infect Dis,2006
2. Preparing for the next pandemic;Osterholm;Foreign Aff,2005
3. Update: isolation of avian influenza A (H5N1) viruses from humans—Hong Kong, 1997–1998;CDC;MMWR,1998
4. Preparing for the next pandemic;Osterholm;N Engl J Med,2005
5. WHO. Cumulative number of confirmed human cases of avian influenza A/(H5N1) reported to WHO; 2006. Accessed online March 1, 2007: http://www.who.int/csr/disease/avian_influenza/country/cases_table_2007_03_01/en/index.html.