We have a choice now about the direction that the project moves in
Can be lightweight - no identification / simple survey
Can be heavy tracking - BankID / emails / SMS
@Bjorn Nystedt - questions like smoking etc. maybe not so interesting by themselves. We already have demographic information like this.
Advantages of lightweight approach
Not much more work is needed - can deploy very quickly
No additional privacy concerns need addressing
Advantages of heavyweight approach
Data could be much more useful - link to healthcare records such as COVID tests and backtrack to previous survey data
Reminders will greatly improve repeat answers to the survey and quality of longitudinal data
Identification will ensure proper longitudinal data and avoid people accidentally filling in the survey multiple times as fresh users
If using anything that is personally identifiable, probably needs to be handled together with (or entirely by) FHM (folkhälsomyndigheten)
@Pontus Freyhult (Unlicensed) had some ideas about auto-deletion of data after reminders etc that could sidetrack this, but FHM approach probably easiest and best.