Could You Have Covid-19? Soon Your Smartwatch or Smart Ring Might Tell You

Wearable devices with sensors that continuously gather your temperature, heart rate and blood oxygen could become personal warning systems for the coronavirus

Smartwatches, smart rings and patches that gather your temperature, heart rate and blood oxygen could serve as an early detection system for Covid-19. WSJ’s Joanna Stern strapped a bunch of stuff to her body and recruited a doctor to figure it all out. Photo illustration: Laura Kammerman

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