Big brother tracking your movement during coronavirus via cell phone data?

According to a Wall Street Journal article, government officials across the U.S. are using location data from millions of cellphones to better understand the movements of Americans during the coronavirus pandemic and how they may be affecting the spread of the disease. The data comes from the mobile advertising industry, not cellphone carriers.

Read more at:
https://www.wsj.com/articles/government-tracking-how-people-move-around-in-coronavirus-pandemic-11585393202