Define your target population

Select the country for which you want to estimate seasonal influenza burden of disease. You can estimate burden at the national level or specify a sub-population of interest in the next step.

If you choose (not required), you can specify a sub-population below the national level for which to estimate seasonal influenza burden of disease.

For example, you could specify a geographic area—such as a single city, state, or region—or a population group, such as pregnant individuals. Please note that age ranges are chosen in a later step.