TroVax is a cancer vaccine that was developed by Oxford BioMedica. No cancer vaccines have been proven to cure cancer or extend life yet, TroVax has been studied in a number of trials for colon cancer. TroVax is a cancer vaccine that was developed by Oxford BioMedica. No cancer vaccines have been proven to cure cancer or extend life yet, TroVax has been studied in a number of trials for colon cancer. TroVax uses a tumor-associated antigen, 5T4, with a pox virus vector. 5T4 is found in a wide range of solid cancers and its presence is correlated with poor prognosis. All solid tumors where the 5T4 tumor antigen is present. Clinical development is ongoing in renal cell carcinoma, colorectal cancer, lung cancer, and prostate cancer, and is planned in breast cancer.