CDC Tracked Millions of Phones to See If Americans Followed COVID Lockdown Orders
Location data is information on a device’s location sourced from the phone, which can then show where a person lives, works, and where they went. The sort of data the CDC bought was aggregated—meaning it was designed to follow trends that emerge from the movements of groups of people—but researchers have repeatedly raised concerns with how location data can be deanonymized and used to track specific people.
The documents reveal the expansive plan the CDC had last year to use location data from a highly controversial data broker. SafeGraph, the company the CDC paid $420,000 for access to one year of data to, includes Peter Thiel and the former head of Saudi intelligence among its investors. Google banned the company from the Play Store in June.
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The CDC used the data for monitoring curfews, with the documents saying that SafeGraph’s data “has been critical for ongoing response efforts, such as hourly monitoring of activity in curfew zones or detailed counts of visits to participating pharmacies for vaccine monitoring.” The documents date from 2021...
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