[ray991]

I think this is the right way - store data but publish it publically when you are confirmed with coronavirus. Then apps installed on others phones would automatically see your data and would do an intersect to see if they were in proximity, and notify you accordingly. This way only the data of those impacted by coronavirus becomes public. And although it’s public technically, as the app has access to it behind the scenes, but legally you won’t be allowed to reverse engineer the response data and publish it online on a map,etc. so that adds some privacy from the general public’s eyes.