Christoper âÃÂÃÂToperâÃÂàCabalhiw (right), a local volunteer working with Oxfam as a Public Health Promoter, organising a relay hand washing race between two teams of children. Oxfam public health promotion activity aimed at encouraging children to understand why and how to wash their hands and use the latrines. Oxfam Public Health Assistant Allan A Nayga (left) checking they are correctly washing their hands.