Contact tracing for COVID-19 starts on a small scale in Philly

In Philadelphia, volunteers with the University of Pennsylvania have launched a small-scale effort in contact tracing, a method in which disease detectives track and monitor the interactions and movements of known infected people. Both time- and labor-intensive, contact tracing is most effective on the front end of an outbreak, when there are fewer cases. The university has trained a few dozen volunteers, though limited access to testing and violations of privacy remain concerns.

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