Absolutely. As opposed to now, when international

Absolutely. As opposed to now, when international travel is accessible to easily the majority of western civilization. Which means instead of effectively one large migration event, the threat of constant "seeding" via individual carriers on flights of hundreds of people breathing the same recirculated air for 12 hours at a time. There's a few theories that it spread west from (surprise) china again, through america, and then onwards to europe.. which your docu might touch on.. I'll have to watch when I get a chance.

We're fortunate in some respects and at a disadvantage in others. Not realizing which are which is the biggest issue.