Two hands hold an Iphone; the screen shows the interface of a COVID-monitoring app that reads "No significant exposures"

Coronavirus apps show promise but prove a tough sell

Technology to alert people exposed to the virus could slow transmission, pilot studies show, but only if people and states sign up. So far, most haven’t.
December 7, 2020
The New York Times

The New York Times reports on progress in using smartphone tools to alert people of possible exposure to coronavirus. Lincoln Laboratory's Marc Zissman, who helped develop and test the effectiveness of COVID-19 exposure alert apps, contributes to the story.