The European Commission on Monday launched an EU-wide system devised to link national COVID-19 tracing apps together in its latest effort to slow down the coronavirus pandemic. Following testing in different EU countries earlier this autumn, the bloc’s executive arm said the system got underway with three national apps — Germany’s Corona-Warn-App, Ireland’s COVID tracker, and Italy’s immuni — now linked through the so-called interoperability gateway, The Associated Press (AP) ...