The trial administrator for this study will be responsible for randomizing clusters in the study arms. The DSS area consists of 1360 blocks, each with a population of 212 and is assigned to 17 surveillance workers. For the purpose of this trial 136 clusters will be formed each with 10 blocks i.e., each cluster will have a population of 2120. The trial administrator will randomize the clusters to four arms (each with 34 clusters) using a computer generated randomization schedule. To ensure that clusters of each DSS data collector have a chance of receiving any of the interventions, randomization will be stratified by the surveillance workers' area.