Joanne Liu is a paediatric emergency physician who has devoted her career to medical humanitarianism. She currently serves as the international president of Médecins Sans Frontières (MSF), with whom she has undertaken more than 20 missions since 1996. During the 2014 Ebola crisis, MSF was given a voice at the United Nations General Assembly, bringing it to a new level of engagement with world leaders. In 2015, the bombing of MSF’s hospital in Kunduz, Afghanistan launched the movement’s appeal to the UN Security Council to protect patients and hospitals in conflicts. Joanne’s operational contributions range from introducing comprehensive medical care for survivors of sexual violence, to developing a telemedicine platform connecting doctors in remote areas with medical specialists worldwide. She is a staunch defender of MSF’s unique identity as a field-based organisation that does not compromise on cutting-edge care in crisis response work.