Erwan Rogard/MSF
On Saturday 20 June 2015, MSF began a four-day oral cholera vaccination campaign in Nyaragusu refugee camp in Tanzania for 115,000 Burundian and Congolese refugees. A cholera outbreak was declared in mid-May when thousands of Burundian refugees fleeing political unrest streamed into the camp, almost doubling its size. According to official figures, 3,086 cases and 34 deaths had been reported in Tanzania as at 22 June 2015