This Sticker Absorbs Sweat—and Might Diagnose Cystic Fibrosis

WIRED

The device may make it easier to quickly test newborns and could open the door to at-home monitoring.

IN THE MIDDLE Ages, a grim adage sometimes turned up in European folklore and children’s stories: Woe to that child which when kissed on the forehead tastes salty. He is bewitched and soon must die. A salty-headed newborn was a frightful sign of a mysterious illness. The witchcraft diagnosis didn’t hold, of course, but today researchers think that the salty taste warned of the genetic disease we now know as cystic fibrosis.

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