Cows Engineered to Lack Mad Cow Disease

(AP) -- Scientists have genetically engineered a dozen cows to be free from the proteins that cause mad cow disease, a breakthrough that may make the animals immune to the brain-wasting disease.

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<p><a href="http://www.physorg.com/news86928856.html">Cows Engineered to Lack Mad Cow Disease</a></p> <p>(AP) -- Scientists have genetically engineered a dozen cows to be free from the proteins that cause mad cow disease, a breakthrough that may make the animals immune to the brain-wasting disease.</p>