Would you believe 70% to 90% of all COVID-19 cases are false, i.e. they are not infectious or contagious to others? Impossible! Think of the implications. Millions falsely quarantined, jobs lost, churches and schools closed, sporting seasons canceled, the U.S. economy devastated. Suicides, depression and a constant battering by a media so anxious to keep Donald Trump from being re-elected. It’s the Trump virus, remember? Will someone please ask Dr. Fauci why all our policy has been based on 90% false positives?

https://www.gainesvilletimes.com/opinion/letter-editor/opinion-covid-19-cases-arent-giving-us-a-good-picture-of-whos-contagious/

In three sets of testing data that include cycle thresholds, compiled by officials in Massachusetts, New York and Nevada, up to 90 percent of people testing positive carried barely any virus, a review by The Times found.

On Thursday, the United States recorded 45,604 new coronavirus cases, according to a database maintained by The Times. If the rates of contagiousness in Massachusetts and New York were to apply nationwide, then perhaps only 4,500 of those people may actually need to isolate and submit to contact tracing.

https://www.nytimes.com/2020/08/29/health/coronavirus-testing.html

Many who are forced to isolate are not positive (false positive) or not symptomatic or infections (actual viral load is nearly undetectable). But countries like Australia continue to push their "contact tracing apps" which enforce quarantines on people who have simply been in "close proximity" to a (possibly) infected person. These apps use bluetooth tech to track anyone within the vicinity of the phone running the app.