Contact tracing apps, worldwide

Wednesday, May 27, 2020 - 6:16pm


Mobile phone apps that do contact tracing can help public health officials warn people if they have been exposed to COVID-19. But not all apps are the same. Tate Ryan-Mosley is part of a team at MIT Technology Review that compares apps from more than two dozen countries around the globe. She tells The World's Marco Werman what the apps can and cannot do — and which countries are doing it right.