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Published online 23 November 2001 | Nature | doi:10.1038/news011129-2

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BSE's epidemic proportions

While prion diseases seem to be waning in humans, they could be waxing in sheep.

Variant Creutzfeldt-Jakob disease (vCJD) may claim only around 200 victims, a new model predicts1. This degenerative brain disease is thought to occur when people are exposed to misfolded prion proteins from meat infected with bovine spongiform encephalopathy (BSE or 'mad cow disease').

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