In their research, Liu and colleagues harnessed the potential of a retroviral vector carrying CD19‐CAR, IL‐15, and an inducible caspase‐9 suicide gene (iC9) for the transduction of NK cells derived from UCB.[67] The results of their investigation compellingly establish the efficacy of these modified NK cells in the specific targeting and eradication of CD19‐expressing cellular populations, including primary leukemia cells. The gene discussed is CD19; the disease is leukemia.