Scientists mapped two distinct T cell exhaustion programs driving acute myeloid leukemia (AML) relapse, distinguishing self-derived exhausted T cells from donor-derived counterparts before and after transplant. Using single-cell sequencing, the study links leukemia stem-like blasts to immune suppression programs mediated by factors including MIF, galectin-9, and TGF-β1. The findings help clarify why post-transplant immune escape may differ by cellular origin and timing, providing a more granular immunobiology framework than bulk markers. For developers, the data points to exhaustion-state targeting as a potential lever to reduce relapse risk. In practical terms, the work supports the idea that therapeutic activity may depend on whether interventions can reshape the specific exhaustion program present at a given stage. It also creates new candidate checkpoints and pathways to interrogate in next-generation transplant-associated immunotherapies. The study strengthens the case for using single-cell profiling to stratify immune status and guide intervention sequencing in AML care.