The annual Pierre Stryckmans Memorial Lecture at this years’ BHS-GAM was presented by Prof. Dr. Gérard Socié (Hematology Transplant Hospital St. Louis, Paris, France). Dr. Socié was awarded for his huge contributions in the field of haematology. At the annual BHS GAM meeting, he first presented an overview of recent clinical trials studying the prophylaxis or treatment of acute and chronic graft-versus-host disease (GVHD). Thereafter, he switched to translational research and shared his knowledge on the search for effective biomarkers for GVHD severity and response to treatment, followed by some data from multi-omics analyses to thoroughly dissect GVHD.