NewslettersImmune Regulation News Antigen-Bearing Outer Membrane Vesicles as Tumor Vaccines Produced In Situ by Ingested Genetically Engineered Bacteria By Danielle Corrigan - May 3, 2022 0 Researchers showed that outer membrane vesicles fused to a tumor antigen and produced in the intestine by ingested genetically engineered bacteria function as effective tumor vaccines in mice. [Nature Biomedical Engineering] Abstract