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  • CJD is extremely rare. It affects at least one person in every million people, within the total population each year.
  • Researchers have found no firm evidence of transmission of classical CJD (sporadic, medically acquired or genetic forms) through exposure to blood and blood products.
  • In almost 90 per cent of cases, it is not understood how or why CJD occurs.
  • The only proven cases of medically acquired CJD have been those which have had direct exposure to highly infective contaminated tissue (for example, CJD brain tissue) and neurosurgical equipment.

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Reviewed on: 30-08-2013