Mad cow disease: On april 24, the U.S. Department of agriculture reported the fourth confirmed case of mad cow disease in the U.S., the first since 2006. No humans affected. See: http://blogs.Scientificamerican.Com/observations/2012/04/25/the-fourth-u-s-case-of-mad-cow-disease-should-you-be-concerned/.
Answered 7/24/2012
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