We are moving from a world where we treat illnesses to one where we predict and prevent them, advised by mobile doctors in our pockets.

This new era of medicine is being driven by an explosion in health-related data from a growing range of public and private sources, analysed by increasingly powerful number-crunching computers.

And now that sequencing human genomes is getting faster and cheaper, the days of truly personalised healthcare are drawing closer.

See on www.bbc.co.uk