Even when used properly, vaccines have limitations. This concept is known as biosecurity. Biosecurity refers to management practices that reduce the chances infectious disease will be carried onto farms and reduce the spread of infectious disease already on farms. This relationship points out opportunities for preventing infectious diseases. For example, producers can prevent some diseases by using vaccination to increase immunity.
Producers can also prevent disease by keeping infectious agents from coming onto their farm.
If an infectious agent is already on the farm, producers can try to eradicate it or control its spread. Vaccination is likely to be most effective when it is planned to meet the particular needs of a farm. Setting up a strategic vaccination program means determining what diseases to vaccinate against, identifying who will most benefit from vaccination and finding out when they will most need the protection that vaccines provide. The goal is to protect pregnant cows and heifers against abortions and other reproduction problems caused by these two viruses. To make sure cattle are protected throughout pregnancy, they should be vaccinated before they are bred.