Since mid-May 2017, MSF teams have witnessed an abrupt increase in daily departures from Cameroon of Nigerian refugees who had fled the conflict between the Nigerian armed forces and Boko Haram. People are leaving the Minawao refugee camp in Cameroon due to the difficult living conditions there and go to Nigeria in the hope of finding a better situation. They first reach the militarised camp in Banki and some also transit on to Pulka. Neither of these locations has the capacity to cater for a mass influx of new arrivals and there are big unmet needs for water and shelter. People in Banki and Pulka are reliant on aid as they cannot move freely outside the camps. People are leaving Cameroon without knowing that an even worse situation awaits them on the other side of the border.