CD8A and neoplasm: Furthermore, these PBNP‐PTT‐derived CD8+ effector and effector memory T cells secreted IFNγ and TNFα, and expressed CD107a on their surface, upon co‐culture with the target tumor cells, suggesting T cell engagement, activation, and downstream effector function,60, 61, 62 in contrast to Lysate‐derived T cells and CD14− cells which did not exhibit these markers.