CD8A and neoplasm: reported PLGA polymer decorated with polyethylene glycol (PEG) and anti‐CD8a antibodies, capable of targeting CD8+ T cells that were circulating in mouse blood, or resident in lymphoid organs and tumors.[84] To target a phenotype of exhausted CD8+ T cells in tumor, anti‐PD‐1 antibody was conjugated on the surface of PLGA/PEG nanoparticles.