Hello, Today, Iza Ciglenecki, Operational Research Coordinator at MSF Switzerland shares results from *operational research conducted after the first-ever vaccination campaign during a hepatitis E epidemic in Bentiu camp, South Sudan*. This study—made possible through the collaboration of MSF, the South Sudanese Ministry of Health, the University of Geneva (UniGe), Geneva University Hospitals (HUG), Johns Hopkins University, and Epicentre—is a major step forward in the fight against a disease with no existing treatment. These findings offer renewed hope, especially for pregnant women who are most at risk, and have already influenced international health recommendations. https://youtube.com/shorts/QQP38EF1ZK0