JonNYC and Gary Leff just tweeted about the positive circumstance 3-4 days ago. I thought Gary said something about AA's policy being a passenger is able to reschedule a flight without additional cost within 7 days of a positive covid test?

Of course, that wouldn't help if a passenger isn't able to get a negative test result within 7 days, or a letter (if accepted by the destination country).

There was some discussion in the tweets about whether the test had to occur at the airport. But if that's the policy, it's a bit short sighted. My guess is that a fair number of people who tested positive at home, unless deathly sick, would drag themselves to the airport to repeat the test. Even knowing it would expose people, to save significant $$$.