Well, I've now been in and out of isolation.
I am told that it is common for patients treated with Paxlovid
to get lingering faint positives on their first antigen test after treatment, as I did.
Anyway my symptoms are much improved, and there is no fever.

So, the protocol now is to mask and to social distance,
and in particular
not to eat in the presence of others.
Otherwise I can leave the isolation room
and sleep in my own room again.