Gene addition and editing strategies for transfusion-dependent β-thalassemia have gained momentum as potentially curative treatment options, with studies showcasing their efficacy and safety. We report the first real-world application of betibeglogene autotemcel (beti-cel; ZYNTEGLO™) during its period of active license in Europe from January 2020 to March 2022 for patients aged ≥ 12 years without a β0/β0 genotype and without a human leukocyte antigen (HLA)-matched sibling donor, before …