German coronavirus smartphone tracing app goes live

Germany sought to mobilize the public on Tuesday to download a new smartphone app that seeks to help break the chain of coronavirus infections, one of several such apps in Europe that governments hope will revive travel and tourism.The new Covid-Warn-App, which became available for download for Apple and Android phones overnight, uses Bluetooth short-range radio to monitor close contacts between people and issue a warning should one of them test positive.Germany follows European countries like I