Efficacy of a combination modified-live IBR-BVD-PI3-BRSV vaccine + Mannheimia haemolytica toxoid against challenge with virulent BVDV-1b and BVDV-2 viruses in young calves 60 days of age. Bov. pract. 2021;55(1):1-12. doi:10.21423/bovine-vol55no1p1-12