LV, a control group that would be a hub for cross-communicating the virus between travelers from all over the country.
Cities that are NOT significant travel desitinations, convention and party centers, those sorts of cities are containable control groups.
I do think it is an opportunity. Get some of those machines that put out a result in 5 minutes. You need it placed at a critical entry point which is separate from the general layout. If you find a positive...
Meh...Macau casinos have been up and running for quite a while without that happening.