The CGPP also maintains maps of the area of each community workers, with individual households designated on the map either by a tracking number or by the same numbering system used on the corresponding register, again, either at the local health post level or by the community workers themselves.
Table 1 presents the rate of full routine immunization coverage against polio in CGPP area in each country.
The evidence presented supports the conclusion that the CGPP approach of targeting high-risk areas for house-to-house visits played a role in increasing routine OPV3 completion.
This differential impact provides evidence that, in rural areas, CGPP volunteers may have been effective in improving caregivers' receptivity to vaccination but are incapable of overcoming the barrier of geographic distance.
Within the CGPP, even in populations where resistance has been a significant problem, delivery of specific knowledge about the polio virus and vaccine, validated by locally recognized authorities, such as religious leaders, has been a key part of strategy of the project.
The full CGPP addresses larger issues, like social acceptability simultaneously with knowledge gaps.
In addition, the home visit was implemented in the CGPP context as part of a package of several activities, including community announcements, mid-media small group education talks, and mass communication.
Using a matrix of objective criteria, including routine immunization coverage with pentavalent vaccine, coverage in previous polio vaccination campaigns and history of poliovirus transmission, the official polio eradication body in each country designates highrisk areas, and within each assigned high-risk area, the CGPP targeted the most underserved populations.
The CGPP plans to continue to refine its risk profiles to identify social and geographic factors influencing subpopulations at risk of under-immunization.
House-to-house visitation is indicated for all families (prioritized according to the child's individual age and immunization status) within CGPP catchment areas because the programme works only in settings already defined as high-risk areas.