RT Journal Article SR Electronic T1 Integrated digital system for community engagement and community-based surveillance during the 2014–2016 Ebola outbreak in Sierra Leone: lessons for future health emergencies JF BMJ Global Health JO BMJ Global Health FD BMJ Publishing Group Ltd SP e003936 DO 10.1136/bmjgh-2020-003936 VO 5 IS 12 A1 Mohamed F Jalloh A1 Paul Sengeh A1 Nyuma James A1 Saiku Bah A1 Mohammad B Jalloh A1 Katharine Owen A1 Samuel Abu Pratt A1 Allan Oniba A1 Musa Sangarie A1 Samuel Sesay A1 Jamie Bedson YR 2020 UL http://gh.bmj.com/content/5/12/e003936.abstract AB Community engagement and community-based surveillance are essential components of responding to infectious disease outbreaks, but real-time data reporting remains a challenge. In the 2014–2016 Ebola outbreak in Sierra Leone, the Social Mobilisation Action Consortium was formed to scale-up structured, data-driven community engagement. The consortium became operational across all 14 districts and supported an expansive network of 2500 community mobilisers, 6000 faith leaders and 42 partner radio stations. The benefit of a more agile digital reporting system became apparent within few months of implementing paper-based reporting given the need to rapidly use the data to inform the fast-evolving epidemic. In this paper, we aim to document the design, deployment and implementation of a digital reporting system used in six high transmission districts. We highlight lessons learnt from our experience in scaling up the digital reporting system during an unprecedented public health crisis. The lessons learnt from our experience in Sierra Leone have important implications for designing and implementing similar digital reporting systems for community engagement and community-based surveillance during public health emergencies.Data are available in a public, open access repository. https://doi.org/10.6084/m9.figshare.8247002.v1