contact tracing German police use COVID tracing app to find potential witnesses Thom Dunn

contact tracing What to know about COVID tracing apps Thom Dunn

contact tracing North Dakota's COVID-19 contact tracing app leaks location data to Foursquare and a Google Ads ID: Report Xeni Jardin

contact tracing Apple and Google are working on coronavirus contact-tracing technology for iOS and Android Xeni Jardin