(Q4650)

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Revision as of 20:04, 19 May 2020 by Genferei (talk | contribs) (‎Created claim: Property:P100: 17 April 2020)
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Contact tracing app uses ultrasound technology to accurately gauge the distance between people.Carnegie Mellon is considering how it might use the app in its plans to re-engage research on campus.
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17 April 2020
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