The BVDV antigen is a molecule that induces the immune system to produce antibodies. BVDV antigens are typically extracted from viruses and, after purification and treatment, can be used to prepare vaccines or perform diagnostic tests. The BVDV antigen can be used to detect the presence of BVDV antibodies in animals, and can also be used to prepare vaccines to prevent the occurrence of bovine viral diarrhea disease.

The preparation of BVDV antigens usually requires highly purified viruses, which requires the use of advanced biotechnological means. In recent years, with the development of biotechnology, more and more researchers began to try to use genetic engineering technology to prepare BVDV antigen, which can be more efficient to prepare a large number of BVDV antigens, and can avoid the use of the virus itself, thus reducing the safety risk.