dr. francis collins, in the white house briefing room today. that's miles o'brien. >> reporter: dr. nks for being with us. >> nice to be here. >> reporter: i suppose when you look at the broad course of history from the time we were drawing blood and putting leaches on people to today, medicine has always gotten more precise. but when we talk about precision medicine now, what are we really talking about? >> we're taking about the idea that we're all different individuals and the best way to keep us healthy or treat us when we're sick is to take account of the individual differences, whether that's an understanding if you have cancer what exactly is going on in your cancer cells, or whether giving you the right drug at the right dose for you. let's understand how to do that better. we've tried to do things like that over decades, but we haven't really had the tools. the time is now to really make that opportunity become a reality. >> reporter: it's been a dozen years since we've unlocked the human genome, we have been waiting for magic cures and they have been slow to come. has the c