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Could a Small Test Screen People for Covid-19?

Translating theory into practice, however, will come with many challenges. Smell tests that can reliably identify people who have the coronavirus, while excluding people who are sick with something else, are not yet widely available. (Dr.…

How to Make Data Privacy Real

This article is part of the On Tech newsletter. You can sign up here to receive it weekdays.The U.S. government last week settled with an app that lets women track their periods over claims that it shared its users’ health information with…