Contact tracking, intentionally spreads a wide net and with luck a high number of negative tests, and few positives. Some false positives are inevitable given the limits of testing. The worst possible testing outcome is a false negatives as that prevents the infected person getting into treatment and they continue to unwittingly spread the disease. Sadly some (many? most?)of the testing methodologies being used for COVID-19 are proving to be "unreliable" resulting in high levels of both false negatives and false positives.
This system will result in zillions of false positives if, as it appears, the breadth of its net is defined by the limits of technology rather than the reality/necessity of the situation.
And a lot of people will experience unnecessary anxiety as a result.
And the results will be skewed accordingly.
A follow-up system to track the outcome of all the positives would be useful. I wonder if it's been contemplated?
