Life on the margins
A refugee woman waits for medication at a treatment centre run by humanitarian organisation Medecins Sans Frontieres (MSF), or Doctors Without Borders, at the Yida camp in South Sudan's Unity State, April 18, 2013. The refugee camp has 72,058 registered refugees, according to the United Nations High Commissioner for Refugees (UNHCR), and is considered to be one of the most challenging refugee camps in the world.