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Technology is changing health care in a myriad of different ways, and within that, genome mapping is potentially revolutionary.

One consequence of that, is it arguably makes a stronger case for the NHS than there has ever been.

Here the former chief executive of the NHS, in England, Sir David Nicholson, sets out his argument why.

(Image: Human genome, credit: ÃÛÑ¿´«Ã½)