[M T]

There are far too many new positive cases to effectively contact trace and preemptively quarantine (to have a visible/immediate impact). ...

In Southern California, I think you are correct. However, San Mateo County claims they are contact tracing 100% of the cases in the county.

In its May 18 attestation as to why they should be allowed to open up faster, L.A. County claimed they were going to staff to handle 2500 cases a day

DPH anticipates an ongoing rise in the number of confirmed COVID-19 cases that will reach or exceed 2500 cases a day. In anticipation of a rise to this level, DPH projects needing approximately 2500 additional staff to support surge response in contact tracing. This projection is based on the following information: ...

They have exceeded 2500 earlier this week (as a high, not average).  They claim "Percentage of COVID-19 cases that have follow-up investigation initiated within 1 day of assignment: 98.6%"   Of course, "assigned" and "initiated" leave a lot of wiggle room.  Is an outgoing text sufficient to be an initiation?  Or, just doing a search for a phone number, or filing a report?  I don't know.  But the number of cases appear to continue to climb.

I would like to challenge every public health office and every state in the country to publish the stats of new cases that were contacted by tracing before getting a positive test.

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The US had an average of 566 reported COVID deaths per day in the last week.  That's equal to the sum of the WWI and WWII US death rates.

[M T]

There are far too many new positive cases to effectively contact trace and preemptively quarantine (to have a visible/immediate impact). ...

In Southern California, I think you are correct. However, San Mateo County claims they are contact tracing 100% of the cases in the county.

In its May 18 attestation as to why they should be allowed to open up faster, L.A. County claimed they were going to staff to handle 2500 cases a day

DPH anticipates an ongoing rise in the number of confirmed COVID-19 cases that will reach or exceed 2500 cases a day. In anticipation of a rise to this level, DPH projects needing approximately 2500 additional staff to support surge response in contact tracing. This projection is based on the following information: ...

They have exceeded 2500 earlier this week (as a high, not average).  They claim "Percentage of COVID-19 cases that have follow-up investigation initiated within 1 day of assignment: 98.6%"   Of course, "assigned" and "initiated" leave a lot of wiggle room.  Is an outgoing text sufficient to be an initiation?  Or, just doing a search for a phone number, or filing a report?  I don't know.  But the number of cases appear to continue to climb.

I would like to challenge every public health office and every state in the country to publish the stats of new cases that were contacted by tracing before getting a positive test.

=========

The US had an average of 566 reported COVID deaths per day in the last week.  That's equal to the sum of the WWI and WWII US death rates.