I agree 100% with the Alphabet/Apple approach. There's no additional absolute location tracking. But it's easy to get the contact histories for all those infect

I agree 100% with the Alphabet/Apple approach. There's no additional absolute location tracking. But it's easy to get the contact histories for all those infected. If health authorities want to identify infection hotspots, they can request location histories from infected people and their contacts. That's no more than health authorities have requested in the past. It's just easier to produce, and more accurate.