The Foundation For Rare Diseases supports the emergence of innovative projects in e-health & rare diseases, in particular through annual co-design workshops. These days of meetings and interdisciplinary collaborative work are designed to concretely support the initiation of e-health projects, targeting the major challenges for rare diseases. In particular: reducing diagnostic error and inequalities in care and life paths. The project also aims to document – through concrete examples provided by actors in the field – the digital health needs that would be the most efficient for complex and chronic diseases, in an approach that can be transposed to many health situations.