Here's what could happen in PR for passengers arriving from the BVI on through flights to the US: PR is a CPB port of entry and you pass through US customs as an international traveler. If you test positive on entry, you get a tracking bracelet and have to arrange your own accommodations in a local hotel who's agreed to take you in. Your transportation to that hotel will be by prearranged vehicle. We aren't talking about 100s of travelers at a time here. I'm using the BVI government's own protocols here as a model. They may or not be the same.