Prevention (continued)

To help ensure the safety of the blood supply, people with a risk of exposure to CJD or vCJD aren't eligible to donate blood. This includes people who:

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> Have a biological relative who has been diagnosed with CJD

> Have received a dura mater brain graft

> Have received human growth hormone

> Spent a total of at least three months in the United Kingdom from 1980 to 1996

> Spent five years or more in France from 1980 to the present

> Received a blood transfusion in the U.K. between 1980 and the present

> Have injected bovine insulin at any time since 1980