I thought I had read that South Korea was using cellphone geolocation data of people who had tested positive in order to identify/alert others who may have had

I thought I had read that South Korea was using cellphone geolocation data of people who had tested positive in order to identify/alert others who may have had contact with them while they were contagious? Edit: Not quite as big brothery as I thought it would be https://www.washingtonpost.com/world/asia_pacific/coronavirus-south-korea-tracking-apps/2020/03/13/2bed568e-5fac-11ea-ac50-18701e14e06d_story.html https://www.washingtonpost.com/world/asia_pacific/coronaviru...