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Providing water, sanitation, and hygiene (WASH) to emergency‐affected populations is necessary for reasons of dignity and disease control. Such a (humanitarian) response is coordinated via the 'cluster approach'. This study utilises a literature review, an appraisal of and analysis of Global WASH Cluster (GWC) documentation, and key informant interviews to summarise the outcomes and impacts of GWC coordination. Across these three datasets, consistent themes were identified, including: the cluster approach evolving into a cost‐effective 'best‐fit' model; cluster staff requiring technical and coordination skills; and cluster members facing participation‐related trade‐offs. Consistent intractable difficulties were pinpointed, too, such as: accountability to beneficiaries; cross‐cluster and subnational cluster coordination; and working with national governments. Previous research was found to be largely subjective and not to address future cluster challenges. An analysis of cluster outcomes and impacts, including member and beneficiary perspectives, is needed. To facilitate this work, a theory of change for cluster coordination was also developed. [ABSTRACT FROM AUTHOR]

Recent systematic reviews have highlighted a paucity of rigorous evidence to guide water, sanitation and hygiene (WASH) interventions in humanitarian crises. In June 2017, the Research for Health in Humanitarian Crises (R2HC) programme of Elrha, convened a meeting of representatives from international response agencies, research institutions and donor organisations active in the field of humanitarian WASH to identify research priorities, discuss challenges conducting research and to establish next steps. Topics including cholera transmission, menstrual hygiene management, and acute undernutrition were identified as research priorities. Several international response agencies have existing research programmes; however, a more cohesive and coordinated effort in the WASH sector would likely advance this field of research. This report shares the conclusions of that meeting and proposes a research agenda with the aim of strengthening humanitarian WASH policy and practice. [ABSTRACT FROM AUTHOR]