Well, finally we have a prototype for the solution.
We are working on the open source application with personal privacy in mind that can be used on a country level to check for virus infection possibility. All the personal and location data will be processed locally (on the phone) only. Only infected person are able to upload their paths on the server which will be available for all other people for the cross-test for infection possibility.
The app will be developed by Gurtam Space team and backed up by flespi. Middle of next week we will have the internal prototype that will be either moved to trash bin or continue into a real app.