[exDemMom]

I would guess that after three weeks the old “new” cases are either recovered - or dead.

Covid-19 illness can last up to 6 weeks, IIRC. I do not know how states are determining that mild cases have resolved.

[PeteB570]

Our state is not even testing mild cases.

Only people tested pretty much are 65 and over, those hospitalized with symptoms and first responders.

Show up with mild symptoms and you’re told to go home and shake it off.