Annabell Sprenger is a fifth-year medical student at the University Hospital of Regensburg (UKR), Germany, and a doctoral candidate at the Department of Anaesthesiology. She is actively involved in the ME/CFS research group and contributes to the MIRACLE collaborative research project (University Hospital Gießen-Marburg and UKR). Her work focuses on vascular dysregulation in ME/CFS and on developing clinically applicable, multimodal diagnostic approaches.