Flights into Zihua from MEX

You're pretty much missing the point, bub. Increased testing doesn't CAUSE cases of infection. The virus does that. Increased testing FINDS the cases of people already infected. That's the only way of having any chance of isolating them, tracking their contacts, and breaking the chain of transmission. It's amazing how many people still babble meaninglessly about it being pointless to test people who are not (yet) ill. That's the only way to find unsuspected infection and deal with it effectively. Testing people who are already sick is the wasteful, blind way to use supplies. This is not complicated.