TNFSF13B and myasthenia gravis: This study utilizes single‐cell RNA sequencing (scRNA‐seq) of bone marrow and peripheral blood from MG patients during acute exacerbations, combined with experimental autoimmune myasthenia gravis (EAMG) mouse models and clinical cohort analyses, to investigate the potential involvement of a neutrophil–B‐cell activating factor (BAFF) –plasma cell axis.