Cholera is an acute diarrhoeal disease that can kill within hours if left untreated due to severe dehydration. An oral cholera vaccine campaign in Iraq, consisting of 2 rounds of vaccines, is a key measure to help contain and control the outbreak. The Iraq government campaign, supported by WHO and UNICEF, reached over 232 000 displaced people above 1 year of age who were defined as high risk groups, based on a public health risk assessment in 62 camps for refugees and internally displaced persons. Of Iraq’s 18 governorates, 17 have reported laboratory confirmed cases. This campaign is part of the cholera response strategy to prevent the further spread of the disease in high-risk areas and to avert a potentially large-scale cholera outbreak in the country’s more vulnerable camps.