Treating diseases like cancer is often not easy.

Yes, doctors have gotten much better at it by gathering data and choosing a treatment that can hopefully best target the disease.

But there's room for improvement. a treatment that can hopefully best target the disease.

But there's room for improvement.

With other complex conditions like heart disease or even pregnancy, there's still a lot that's

left up to chance, giving physicians few options other than to try something and see if it works.

In the future though, doctors could have a lot more certainty that a particular intervention

would work the way it's intended.

They could do it by testing the treatment out on a digital twin.

That's a digital model of a patient based on real data.

Researchers are starting out slow, making replicas of individual organs. But their ambitions are much bigger.

Based on this they have this idea that you could create an entire digital replica

basically where you could not only test certain things if something goes wrong but you could do

preventative care. From the Wall Street Journal this is the future of everything. I'm Alex

Ocala. I spoke with W.S.J. Senior Special writer Stephanie Armour about digital twins, how to make

them and how they could revolutionize health care. Stay with us.

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Stephanie, what is a digital twin?

There's a lot of different descriptions of it, but if you look at it in the health

care space, one of the ways that it's being used or being designed right now is basically to allow clinicians

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