Community mapping. Primary care clinics and evaluation villagers will be selected in consultation with the program lead for PSI's CBDA programme, and in consultation with the relevant District Health Offices, Primary care clinics and the CBDAs themselves.Once villages have been selected, preliminary mapping exercises will be initiated including demarcation of the village boundaries and location of dwellings with geographical position system (GPS) and a brief household-level questionnaire (name of household head, demographics of household members).