Two types of maps are available:
- Current status of the control programme - showing the total consecutive rounds with effective coverage for each implementation unit
- Progress of the control programme - providing a yearly breakdown of the coverage achieved by the control programme over its lifetime
The principle source of treatment data are coverage estimates based on programme treatment registers. These are provided by national programmes to WHO regional offices as part of annual reports and drug applications submitted to donation programmes. For each year, the data abstracted includes the total population of each implementation unit, the total populations targeted and the number of individuals ingesting tablets.