CD8A and cancer: For example, dendritic cell-derived EVs loaded with viral antigens have demonstrated the capability for activating a CD8+ T-cell-mediated anti-tumor immunological response [43, 59, 61], while another study demonstrated the capability of bioengineered EVs conjugated to bacterial and viral antigens for activating macrophage and T-cell-mediated cytotoxic immune responses against cancer cells as well [57, 59, 60].