It's hard to comprehend the scale of the medical and humanitarian needs in South Sudan. Four million people, a third of the population, have been displaced by years of conflict. South Sudan remains one of the most dangerous countries in the world to deliver a baby or to be a child under five years old. And one of the real tragedies in South Sudan is that so many of the diseases we see are preventable and treatable. Outgoing Head of Mission, Will Harper, discusses how MSF is making immediate and long-term impacts, and how he finds hope in seeing the growth and development of our South Sudanese MSF colleagues.