From: Preparing for pandemics: a systematic review of pandemic influenza clinical management guidelines
 | A (H1N1) | A (H7N9) | A (H5N1) | Influenza A | Pandemic influenza | Total |
---|---|---|---|---|---|---|
World Bank region classification | ||||||
 East Asia and Pacific | 3 | 1 | 1 | 1 | 4 | 10 |
 Europe and Central Asia | 10 | - | - | - | 2 | 12 |
 Latin America and the Caribbean | 14 | - | - | - | 4 | 18 |
 Middle East and North Africa | 1 | - | - | - | - | 1 |
 North America | - | 1 | - | - | 3 | 4 |
 South Asia | 1 | - | - | - | - | 1 |
 Global | 1 | - | - | - | 1 | 2 |
 Total |  |  |  |  |  | 48 |
World Bank income classification | ||||||
 High-income countries | 11 | 1 | 1 | - | 7 | 20 |
 Upper-middle income countries | 12 | 1 | - | 1 | 5 | 19 |
 Lower-middle income countries | 3 | - | - | - | 1 | 4 |
 Low-income countries | - | - | - | - | - | - |
 Global or regional | 4 | - | - | - | 1 | 5 |
 Total |  |  |  |  |  | 48 |