PARIS—When countries across the West emerged from lockdown in the spring, governments trained legions of investigators to identify and isolate people potentially infected with the coronavirus. The ...

Singapore will only allow police to access personal data from its coronavirus contact-tracing app for "serious" criminal investigations, a move aimed at addressing privacy concerns among users and to ...

In February, the state of California introduced new long-term regulations that will require employers to conduct COVID-19 contact tracing for all positive cases until early 2025. But despite three ...

The risk of catching COVID-19 as calculated by a smartphone app scales with the probability of subsequently testing positive for the coronavirus SARS-CoV-2, showing that digital contact tracing is a ...

Singapore is officially turning off its COVID-19 contact tracing system amidst plans to further ease travel restrictions, as the country exits the "acute phase" of the pandemic. Plans also are in ...

Hong Kong has announced it will scrap some remaining restrictions on travelers and end contact tracing, after Beijing shifted away from its hardline zero-Covid stance. Health Secretary Lo Chung-mau ...