[joshuamorton]

> The targeted false alerts problem

You require, for example, a registered healthcare provider to approve the act of marking yourself as symptomatic. Which basically means that you can't mark yourself as symptomatic unless a doctor agrees/diagnoses you, which is a good idea anyway, given the amount of people who are like "my flu in december must have been COVID".

[chvid]

But that would be a quite a different app from what is described here; as far as I can see self-diagnosis is how you use the app.