Volume 21, Number 2—February 2015
Synopsis
Timing of Influenza A(H5N1) in Poultry and Humans and Seasonal Influenza Activity Worldwide, 2004–2013
Table
Summary data for 8 countries that reported 90% of worldwide influenza A(H5N1) outbreaks among poultry and 97% of all human H5N1 cases, January 2004–December 2013*
Country | Geographic region | No. poultry H5N1 outbreaks | No. human H5N1 cases | Peak month for poultry H5N1 outbreaks | Peak month for human H5N1 cases | Peak month for human seasonal influenza cases |
---|---|---|---|---|---|---|
China | Northern Temperate | 119 | 44 | February | January | February |
Egypt | Northern Temperate | 2,516 | 173 | March | March | December |
Turkey | Northern Temperate | 225 | 12 | January | January | March |
Bangladesh | Northern Temperate/Tropical | 549 | 7 | February | March | July |
Cambodia | Tropical | 35 | 47 | February | January | October |
Indonesia | Tropical | 3,555 | 195 | February | January | December |
Thailand | Tropical | 1,138 | 25 | October | January | September |
Vietnam | Tropical | 3,194 | 122 | February | January | June |
*H5N1 was declared endemic in Indonesia in 2005 and Egypt in 2007. After these dates, these countries did not report outbreaks to the World Organisation for Animal Health on a monthly basis. To obtain the monthly number of outbreaks after countries become endemic, we analyzed their 6-month reports; these reports are made by every country.
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