| abstract |
Combined vaccine for the protection of susceptible ruminants against BVDV, characterized in that the vaccine comprises a first BVDV belonging to a first type and carries an E2 gene of BVDV of said first type, a second BVDV belonging to a first type, in that the BVDV E2 gene belonging to said first type is replaced by the BVDV E2 gene belonging to a second type, and a pharmaceutically acceptable vehicle, and in which said first BVDV and said second BVDV have the same structure. |