In a similar vein, University of California, Irvine researchers developed an open-source codebase for a QR code–based app called TrackCOVID, which alerts people if they’ve interacted with infected people. The QR codes will be posted in high-traffic areas, such as university campuses, grocery stores and public transportation hubs. “If you went to the same place as someone who was exposed within a certain time frame, you will be notified that you may have been exposed,” says Tyler Yasaka, co-developer of the app. Read More