VideoVolume Number December 15, 2011
Jean DurocherM.Sc., D.M.V.

What is Immunity?

What is Immunity?

What is immunity? A heifer's immune system learns to identify the stressing agent either by contact with the illness or by vaccination. What is the difference between a killed vaccine and a live one? We refer to vaccination as a tool to protect heifers against diarrhea, respiratory problems and to prevent abortion or the birth of an immunotolerant.