Thanks, D1!
Test results came in: My wife, daughter and I all tested negative for CV-19. Yay!
But, now I seem to be coming down with whatever “bug” my daughter DID have. (Sore throat, fatigue, headache, slight fever.) It’s almost certainly NOT serious, but it is a bit of an annoyance: It slows down my catching up after being quarantined! I should not complain, though. :-)