I’m obviously of the opinion that vaccine passports to attend sporting events, concerts, etc. are just fine and dandy. That said, I think there’s even more of a case to be made for having vaccine passports for international travel. Do we really want unvaccinated Americans or whatever country is having a surge at the time traveling to other countries and spreading covid? It’s one thing for unvaccinated people to spread it to other willfully unvaccinated Americans who know the risks they’re taking, but it’s an entirely different thing to go to Jamaica or Cancun or something and start an outbreak among people who haven’t even had the opportunity to get vaccinated.
Yes, there’s the argument that it discriminates against people in poorer countries with less vaccine access, but I can’t imagine a lot of people in these countries are jet-setting around the world.