A healthy investment?

IF ALL goes to plan, sometime next year British celebrities and parliamentarians of a certain age may find themselves being asked to make an unusual donation to a worthy cause. Not of money or time, but something more personal: a sample of blood, and access to their medical records. The government scientists requesting these gifts will be hoping for a show of trust and generosity strong enough to persuade nearly half a million ordinary Britons to make similar donations. If they succeed, the result will be Biobank, the largest collection of DNA samples linked to medical records in the world.…