@sunemai: Just fyi, here in Germany a medical uni and some companies seem to currently do the geodata approach: https://www.heise.de/newsticker/meldung/Medizi

@sunemai: Just fyi, here in Germany a medical uni and some companies seem to currently do the geodata approach: https://www.heise.de/newsticker/meldung/Medizinische-Hochschule-Hannover-und-Ubilabs-entwickeln-Corona-App-4680487.html https://www.heise.de/newsticker/meldung/Medizinische-Hochsch... https://www.geohealthapp.de/ https://www.geohealthapp.de/