NCIt definition : A cancer vaccine consisting of a recombinant vector encoding the tumor-associated
carcinoembryonic antigen (CEA) that is contaminated with bovine viral diarrhea virus
(BVDV). The carcinoembryonic antigen (CEA) is a prevalent tumor marker expressed by
a number of different cancers such as colorectal, breast, lung and ovarian carcinomas;
vaccination with vaccinia virus genetically engineered to express CEA may generate
antitumoral T-cell responses. BVDV is an RNA pestivirus that may contaminate vaccines
due to its presence in fetal calf serum used as a growth supplement in the tissue
culture of mammalian cells used in vaccine production. (NCI04);