Induced potent and durable effector and memory T‐cell responses;[102] eradicated the metastases and suppressed the growth of pancreatic cancer;[15, 103, 107] significantly reduced regulatory T cells (Treg) and myeloid‐derived suppressor cells (MDSC);[93, 104, 105] extended survival of pancreatic patients,[99] enhanced specific CD81 T‐cell activity.[106]. Here, CD81 is linked to pancreatic neoplasm.