Stanford is looking for participants for its Wearables Data Study, which working to establish if devices like Apple Watch can help detect COVID-19. Gizmodo looked into how it all works.

Once enough people have opted-in via Stanford’s site and their data’s been collected, the second phase involves building a personal dashboard that can tell people when they’re getting sick. And while the original Stanford study’s algorithm was developed using a Basis watch and a few other discontinued devices, this new study aims to be device-agnostic. Fitbits, Apple Watches, and Oura Rings are just some of the wearables included. “We’re getting a tonne of people enrolling who have a smartwatch and have been ill,” Snyder says. “There’s lots of smartwatch wearers out there. There’s 30 million active users from Fitbit, millions from Apple Watch. We’re talking tens of millions of people, all with these smartwatches that could be health protectors for infectious diseases like covid-19.”

There has been a lot of talk about how contact tracing apps could help keep people safe from COVID-19 as countries try to move out of lockdown. There’s a really useful piece on Bloomberg News outlining the issues between various proposed models, including that being developed by Apple and Google.

Apple and Google even renamed their framework Exposure Notification, signaling that it doesn’t do true contact tracing, the process of tracking a virus from person to person. Instead, it lets individual smartphones keep track of which other handsets they’ve come close to by using Bluetooth wireless signals. If a person notifies the network they have tested positive for Covid-19, everyone they could have infected is issued a warning, if they’ve opted in. The system does this matching anonymously on each device, rather than in a central database that governments could use to track the disease more broadly — a feature the companies say is more secure and helps quell user concerns about who sees their sensitive health data.