CD274 and neoplasm: The release of cytotoxic T lymphocyte-associated protein 4 and programmed cell death ligand 1 antibodies from tumours after steady lysis by a probiotic system can result in an abscopal effect, a relative increase in activated T cells, and corresponding increases in systemic T-cell memory populations in mice given probiotic-delivered checkpoint inhibitors (Gurbatri et al., 2020).