This research is funded by ELRHA’s Research for Health in Humanitarian Crises (R2HC) Program (Grant Number: RG203720), which aims to improve health outcomes by strengthening the evidence base for public health interventions in humanitarian crisis. R2HC is funded by the UK foreign, Commonwealth and Development Office (FCDO), Wellcome, and the Department of Health and Social Care (DHSC) through the National Institute for Health Research (NIHR).