Most AC readers haven't used a COVID-19 contact tracing app

Our smartphones aren't saving us. What you need to know AC readers were asked if they've used a COVID-19 contact tracing app on their phones. Over half of those who responded said that they had not used contact tracing apps for whatever reason. However, a surprising number of readers actually had downloaded a contact tracing app and turned on notifications. This past long weekend marked the 4th of July holiday in the United States, and as such, it was a heavy travel period during which larger gr...