These random headlines don't inspire much confidence in contact tracing.

Contact Tracing Is Failing in the U.S. Here's How to Fix It. FROM Kellogg Insight

Why Contact Tracing Efforts Have Failed to Curb Coronavirus Disease 2019 (COVID-19) Transmission in Much of the United States--Oxford Academic

Without a trace: Why did corona app--Journal of Medical Ethics

How Test and Trace Failed--Wired UK

Contact Tracing Is Failing in Many States. Here's Why.--New York Times

Covid: Test and Trace failure helped Indian variant spread, report says--BBC

Coronavirus: track and trace fails in 50% of 'easiest' cases--The Times UK

Germany's coronavirus tracing app criticized over warning failures--DW

Smartphone contact tracing has failed everywhere--The Electric Light Company

Britain's COVID-19 Track and Trace failures, in numbers--Reuters

So you want to be a contact tracer? It's harder than it seems--
north jersey.com

ALMOST POSITIVE HEADLINE: The mixed success of contact-tracing apps--New Statesman