<qa>  What is the cost-effectiveness of RFDA using DHAP with RFTATThe secondary objectives of the study include: 1. Compare the effectiveness of RFDA using DHAP with RFTAT using AL in reducing rapid diagnostic test RDT confirmed malaria incidence through passive case detection at health facilities; 2. Compare the effectiveness of RFDA using DHAP with RFTAT using AL in reducing the prevalence of malaria and preventing re-infection in individuals receiving reactive responses; 3. Compare the cost-effectiveness of RFDA using DHAP with RFTAT using AL in reducing the burden of malaria in the community; 4. Measure the proportion of P. falciparum infections likely attributable to importation and local transmission using parasite genotyping as well as defining genotype spatial distribution; 5. Assess the utility of using serology to measure short term changes in malaria transmission and evaluate malaria elimination programs; and 6. Assess the feasibility of using remotely sensed malaria risk maps to identify areas with higher potential for local malaria transmission. 