Future works should focus on optimizing the particle size and composition of nanocatalysts in this system, which have been reported as important parameters in improving the advanced oxidation catalytic activity and thereby may enhance the immune stimulating effect of this system.[24] Moreover, the combination of immunoadjuvants (e.g., CpG) and immune checkpoint blockades, such as PD‐1/PD‐L1 antibody with whole tumor cell antigens prepared in this work is worth of further investigation for optimal vaccination outcomes. Here, CD274 is linked to neoplasm.