Coronavirus: Contact-tracing apps face further hitches

Norway's health authority has had to delete all data gathered via its Covid-19 contact-tracing app and suspend further use of the tool. The Norwegian Data Protection Authority ruled the Smittestopp app represented a disproportionate intrusion into users' privacy. A switch to a rival design backed by Apple and Google is being considered. Elsewhere, researchers say a bug in the latest version of Australia's app means many iPhones fail to log matches. In mid-April, Norway became one of the first places to introduce a contact-tracing app, when the Norwegian Institute of Public Health and software company Simula rolled out their tool to three of the country's municipalities.