I have difficulty to understand the full concept of the app.
For example, China have it mandatory since day one.
But when a outbreak append as yesterday; They are still locking 18,000 person in a parking lot to test them. (pushing them all clos together)
To work, you need absolutely 100% of tracing, 100% of the time and accuracy.
That’s’ technically and ethically not possible. (even in China apparently)
Good luck with that.
You even have people that found that wearing a mask is impossible.