CD8A and neoplasm: To further elucidate the antitumor immune response of RBC‐Nanovaccines combined with anti‐PD‐1, the infiltration of effector T cells in the tumor was analyzed by immunofluorescence staining, and the results displayed that the most enrichment of fluorescent signals of CD4+ T cells and CD8+ T cells was observed in the combination treatment group compared to other treated groups (Fig 5H and Appendix Fig S20).