Oral cholera vaccination (OCV) campaigns were conducted from February to April 2014 among internally
displaced persons (IDPs) in the midst of a humanitarian crisis in Juba, South Sudan. IDPs were predominantly
members of the Nuer ethnic group who had taken refuge in United Nations bases following the
eruption of violence in December 2013. The OCV campaigns, which were conducted by United Nations
and non-governmental organizations (NGOs) at the request of the Ministry of Health, reached an estimated
85–96% of the target population.