The study is a cluster-randomised controlled trial to evaluate whether the addition of proactive case detection to Community Case Management will provide an increase in early access to care and a reduction in deaths among children aged 0-59 months. The unit of randomisation is the village, as defined by the Government of Mali's Health Information Systems. Villages will be randomised to receive Integrated Community Case Management (i-CCM) from a passive CHW or Proactive Community Case Management (Pro-CCM) from a CHW that conducts daily active case finding home visits. Randomisation will be stratified by health catchment area, distance from the primary health care clinic, and CHW supervisor. All villages in both study arms will receive the removal of point-of-care fees, clinical staff training at primary health centres, and improvement in health centre infrastructure.