In this “Letters to Blood,” the author demonstrated that luspatercept provided prolonged periods of transfusion independence (TI), significantly decreased the transfusion burden among HTB and LTB patients, and generally had an acceptable and predictable safety profile, all of which helped to maintain or enhance patient quality of life. Compared to the results from the primary analysis, these data further demonstrate the clinical benefits of luspatercept in patients with LR-MDS-RS.