"Tech giants Apple and Google have joined forces to develop an
interoperable contact-tracing tool that will help individuals determine
if they have come in contact with someone infected with COVID-19.

As part of this new initiative, the companies are expected to release an
API that public agencies can integrate into their apps. The next
iteration will be a built-in system-level platform that uses Bluetooth
low energy (BLE) beacons to allow for contact tracing on an opt-in basis.

The APIs are expected to be available mid-May for Android and iOS, with
the broader contact tracing system set to roll out "in the coming months."

https://thehackernews.com/2020/04/iphone-android-coronavirus-tracing.html