Facebook is tracking coronavirus symptoms by county to identify hotspots
More than one million people responded to the symptom survey within the first two weeks, Facebook said. It plans to roll out the survey globally this week.
Published Mon, Apr 20 20209:28 AM EDT Updated Mon, Apr 20 202011:23 AM EDT ... Facebook released its first map that tracks coronavirus symptoms county- by-county. ... at the annual Munich Security Conference on February 15, 2020.