Clark Brown, MD, PhD, Aflac Cancer & Blood Disorders Center, Atlanta, GA, outlines the mechanism of action of GBT021601, a next-generation sickle hemoglobin (HbS) polymerization inhibitor developed for the treatment of sickle cell disease (SCD), highlighting the results of Phase I studies evaluating this agent. The study reported that the drug was well-tolerated and led to significantly increased hemoglobin levels. This interview took place at the European Hematology Association (EHA) Congress 2022 held in Vienna, Austria.