Countries around the world have struggled to get people to download and use contact tracing apps.

Trust in the confidentiality of contact tracing broke down during the AIDS epidemic. Today, it's faltering again.

Effective national leadership and trust in government appear to be prerequisites for countries to achieve widespread digital contact tracing.

Smartphone apps and wearable devices can tell when workers have been within six feet of each other, promising to help curb the coronavirus. But they're not all the same when it comes to privacy.

Epidemiological data suggests that 80% of COVID-19 cases can be traced to just 20% of those infected with SARS-CoV-2.

If coronavirus is still circulating, why are we safer now that social distancing measures have been relaxed? A public health expert explains.

Since the state's first coronavirus case surfaced, trained case investigators have traced the contacts of every person who tested positive. Here's what else South Carolina got right.

Humans can identify asymptomatic cases, build trust and assauge fears. Apps cannot.

Despite criticism, the NHS COVID-19 contact tracing app seems well designed.

Are criticisms that governments should have done more fair?