CSF2 and neoplasm: designed a tumor cell‐loaded cryogen sponge that could function as an injectable vaccine platform, delivering antigen‐carrying tumor cells along with GM‐CSF and a specific TLR agonist CpG, while creating space for DCs infiltration and trafficking.[148] They encapsulated GM‐CSF, a DCs enhancement factor, and CpG ODN, a DCs activating factor, into a sponge‐like macroporous cryogel.