13 month old Abdu Lahai Tabin sleeps beside his sister in MSF's ITFC, Yida, South Sudan, Friday, Sept. 14, 2012. *** Local Caption *** Yida refugee camp, September 2012. Between the beginning of March and mid-July 2012, the population of the Yida camp swelled massively with the arrival of 40,000 additional refugees in increasingly precarious health conditions from South Kordofan?s Nuba Mountains. As the size of the camp increases, the services initially sized for a population of around 15,000 people still require further expansion and continuation of current efforts underway. The camp continues to expand with influx of new refugees, however, the overall numbers of new arrivals are much less in recent months than in the months of Apil and May. People fleeing conflict and food insecurity in Sudan are continuing to arrive daily. Up to 1,000 more people are moving into the camp each week. In the absence of accurate data, the population of Yida can be estimated between 50,000 and 65,000.