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Northeast Missouri | I question your reasoning for switching to CattleMaster. Going from a Mod. live to a killed vaccine will get you slightly different viral strains, I suppose, but probably less of an immune response.
If you're in a position to use a Mod. live correctly I'd think you might go with another company's Mod. live as a better way to get a slightly different array of viral strains but still get optimum immune response.
But this is pure conjecture. I hope a veterinarian or somebody in the vaccine industry will comment.
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