Why BVD Vaccination Caused An Abortion
cattlenetwork.com
Cattle that are pregnant and vaccinated with a MLV may on a rare occasion abort their fetuses due to infection with the vaccination virus. IBR/BVD are two viruses that can result in early embryonic deaths, stillbirths and weak calves. This will cause a reduction in calf crops due to decreased pregnancy rates, abortions and greater calf mortality.
The Beef Blog 