This sounds a bit different from what’s gone on so far, in which someone shows up at the doc with Wu Flu, then the doc asks who he’s been in contact with the past so many days. The doc then passes that on to the health department, which then calls the possibly-exposed people to get them to stay home for 14 days.
What I just read sounds a great deal more obnoxious and intrusive.
Just using the technology that’s available.