I was responding to a poster who was talking about vaccination rates outside the US. Our ability to even influence global vaccination rates is pretty limited, and I think we all need to understand that worldwide vaccination is going to be a heavier lift than domestic vaccination, and it's going to take a while.
In the meantime, requiring vaccination for international travel seems like a prudent restriction that can easily be incorporated into our current passport system. We already require particular vaccines for travel to particular regions, so this wouldn't be anything new. And most importantly, it allows people to travel freely while we work on vaccines. Putting everything on hold while we sit around and wait for global herd immunity is a bad idea that none of us should be willing to tolerate.