February 2022: Russia attacks Ukraine. Anticipating the wave of refugees generated by this war, the Geneva University Hospitals create a Ukraine Task Force. In this context, the Programme Santé Migrants (PSM), a reference consultation for refugees, realises that it will not be able to cope with the number of those coming from Ukraine in addition to the others, and creates a parallel structure: the PSM bis. The article describes how it was set up and the challenges that were faced, in particular: express training of staff in ambulatory medicine in a context of migratory crisis, focus on early identification of mental health problems and their management. This experience highlights the importance of a coordinated, interdisciplinary, and culturally adapted approach to responding to a crisis situation.