Surely this crisis is the start of a golden age in aviation and global transport.
After this experience, no government is going to accept the current slipshod health system, the downside is just too high.
So I expect really effective viral health monitoring and countermeasures to become the norm. That will drag the other health and customs systems with it
With luck, we might be able to return to the pre WW1 era when passports were unheard of. and people could go anywhere as the spirit moved them.