Your visit is almost over and you get positive test results before flying back to the US. What happens then? You can't fly back to the US, obviously, without a negative antigen test result.
New hotel, guesthouse Air B&B reservations? Are you charged a change or/rebooking fee with most air carriers? And what about the Covid test itself? You may even be asymptomatic and feel 100%. Do you have to see a doctor and begin a course of treatment and get yourself retested before making a new airline reservation?
These are all potential issues right now. Just wondering if anyone on the forum has encountered this scenario......or know of someone who has.