[laggyluke]

> Once covid19 goes away (if ever), and a new virus appears, NO ONE will have that app turned on, and by then, the new virus will have spread just like covid19.

Devil's advocate: so why not just keep the app running forever in the background?

If there's no virus to report - that's fine.

But the moment a new outbreak starts, the data is already there, you just have to report that you're sick.

[darkwater]

Absolutely, and if it is indeed local only and encrypted until you say you are infected, it could be part of HealthKit and Android equivalent (don't know if it has a name)