Originally Posted by
yosithezet
We don’t see this with regards to TB except for immigration purposes so I doubt it will be the case for COVID-19, if there is a vaccination.
That will surely depend on how widespread, recurrent, and deadly Covid-19 turns out to be. I wouldn't rule out some/many countries requiring proof of vaccination as a condition of entry in future.
Also, and linked, Visa-on-Arrival will be less of a thing, and people will have to go back to getting all sorts of paperwork in advance for a lot of countries that currently don't require it. Simply because a lot of places will be keener to know who you are and where you've recently been
before you pitch up at immigration.