[ray991]

What if every coronavirus victim voluntarily uploads their location data publically (their identity kept anonymous). Now you can, without uploading your own data anywhere, check if you have ever been in vicinity of any of them. If you have been, you can get tested and then upload your own data if that comes out positive. This way not eveyone has to share their data, only a few who have been infected.

[tastroder]

> their identity kept anonymous

If I have your location data, you are not anonymous anymore. Especially these days where you likely spent most hours of the day in your home.

[markvdb]

Cellular triangulation is not sufficiently accurate for that. GPS signal has the same problem, and is often not available inside.

[stagas]

Exactly, push right instead of pull. But it would require the systems to be designed in such a way that the user has ownership of the data they produce. GDPR should have solved that. Google location services have a complete history but it is not something I can download and share with a 3rd party which would in theory simply scan for possible encounters with infected people. We need to design systems that are interoperable, if a system is collecting data I produce, I should be able to retrieve that data at the click of a button, and share them to another service if I wish so.