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.
What is Immunity? - YouTube |
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| Pets & Animals | Upload TimePublished on 4 May 2012 |
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