[BenLurkin]

Majority of people who tested positive for coronavirus at L.A. County facilities didn’t have any symptoms
https://ktla.com/news/local-news/majority-of-people-who-tested-positive-for-coronavirus-at-l-a-county-facilities-didnt-have-any-symptoms/

[PA Engineer]

They should have known that after the Diamond Princess outbreak. What they still don't seem to get is asymptomatic may not be so asymptomatic.

Chest CT Findings in Cases from the Cruise Ship “Diamond Princess” with Coronavirus Disease 2019 (COVID-19)

Simply, all positive tests should be followed up with a lung CT scan. Still to early to tell if the changes are permanent.