When Nathaly Sweeney launched her career as a pediatric heart specialist a few years ago, she says, it was a struggle to anticipate which babies would need emergency surgery or when.

“We just didn’t know whose heart was going to fail first,” she says. “There was no rhyme or reason who was coming to the intensive care unit over and over again, versus the ones that were doing well.”

Now, just a few years later, Sweeney has at her fingertips the results of the complete genome sequence of her sickest patients in a couple of days.

Credit: Pixabay

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