The US is using mobile ad data to track people's movements during coronavirus lockdown
The US is setting up a system to study where people are moving and congregating during the coronavirus pandemic, The Wall Street Journal reports.
The goal, for now, is to find out which places are still drawing crowds and could become hotbeds for the virus to spread. One source gave an example where researchers had found people were gathering in Prospect Park in Brooklyn, and handed the data over to the local authorities. Anonymized data means that personally identifying information such as a person's name and birth date has been removed. Privacy activists worry that anonymized data and aggregated data can still be pieced back together to identify individuals.
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