Further analysis of PD‐L1+tumor cells (CD45−PD‐L1+) and PD‐L1+TAMs (CD45+CD11b+PD‐L1+) revealed that Gel@B‐B elicited the greatest PD‐L1 expression in tumor cells, and also in TAMs (Figure 5J,K; Figure S17, Supporting Information). This evidence concerns the gene ITGAM and neoplasm.