Table 3.

Coding system

1 Inhibitors	2 Strategies	3 Monitoring systems	4 Collaboration and information sharing systems
1.1 Accessibility of populations	2.1 Community informants	3.1 Tailored surveillance performance indicators	(no subcodes were included for this code)
1.2 Communication	2.2 GIS technology	3.2 Tailored surveillance quality assessment tools
1.3 Health infrastructure	2.3 Collection and testing of specimens beyond AFP cases
1.4 Overall infrastructure	2.4 Collaboration with security
1.5 Population movement	2.5 Profiling of displaced people
1.6 Traumatizing violence	2.6 Evacuation (emerging code)
1.7 Malnutrition and disease outbreaks	2.7 Nomadic population (emergent code)
1.8 Rainy season (emergent code)
1.9 Nomadic population (emergent code)