共 4 条
[3]
The signature features of influenza pandemics––implications for policy .2 MA Miller,C Viboud,M Balinska,L Simonsen. N Engl J Med . 2009
[4]
Influenza (Seasonal)Fact sheet 211 .2 WHO. http://www.who.int/mediacentre/factsheets/fs211/en . 2009