developed a 3D macroporous alginate scaffold embedded with reduced graphene oxide (rGO) for high loading and slow release of cargo molecules with the hydrophobic surface and large surface area of rGO.[318] Subcutaneously implanted alginate‐rGO scaffold attracted a large number of DCs and CD4+/CD8+ memory T cells, and resulted in the significant inhibition of B16‐OVA tumor growth with the loading of OVA, granulocyte‐macrophage colony‐stimulating factor (GM‐CSF), and cytidine–phosphate–guanosine (CpG). This evidence concerns the gene CD4 and neoplasm.