AlterNet: The Killer Among Us: "[T]housands of Americans may already be dying because of Mad Cow disease every year....At Yale, out of a series of 46 patients clinically diagnosed with Alzheimer's, six were proven to have CJD at autopsy. In another study of brain biopsies, out of a dozen patients diagnosed with Alzheimer's according to established criteria, three of them were actually dying from CJD. An informal survey of neuropathologists registered a suspicion that CJD accounts for 2-12% of all dementias in general. Two autopsy studies showed a CJD rate among dementia deaths of about 3%. A third study, at the University of Pennsylvania, showed that 5% of patients diagnosed with dementia had CJD. Although only a few hundred cases of sporadic CJD are officially reported in the U.S. annually, hundreds of thousands of Americans die with dementia every year. Thousands of these deaths may actually be from CJD caused by eating infected meat. "