Researchers at St. Jude Children’s Research Hospital reported that in aplastic anemia, multiple independent blood stem cell clones can acquire gene mutations that allow immune escape within the same patient. The team profiled 619 children and adults using high-resolution genomic approaches and described how “rescuing” clones can restore blood production and drive long-term remission. In Nature Genetics, investigators said the protective events include mechanisms that silence risk HLA alleles, with data suggesting the rescued clones are benign and do not show progression to myelodysplastic syndrome or leukemia—even when they dominate the bone marrow. The work refines understanding of autoimmunity escape in bone marrow failure and may influence how clinicians interpret clonal hematopoiesis dynamics during treatment and observation.