Further, other mAb i.e., Belimumab targets B lymphocyte stimulator (BLyS)/ B cell-activating factor (BAFF), used in the treatment of Systemic lupus erythematosus (SLE) is not much effective in improving Quantitative Myasthenia Gravis (QMG) score [205]. Here, TNFSF13B is linked to systemic lupus erythematosus.