[Goopplesoft]

The externalities of not getting vaccinated (see: this article) makes a strong case for requiring them or at least making a subset of them required upon exit for reentry (similar to passports) without religious exemptions.

[ars]

That sounds good on the surface, but has problems in the details.

Do you want a country that prohibits people from leaving when they want? So you can't require it on exit.

And the most basic right of citizenship is the ability to enter the country, so you can't require it on entry either.

All you can do is convince other countries to prohibit entry without vaccination,

[YokoZar]

Yes, as a US citizen, your right to enter the United States is "absolute, unconditional, and irrevocable." That said, we do reserve the right to arrest or fine you immediately upon entry.

[toomuchtodo]

Also, the CDC has the right to quarantine you.

http://www.cdc.gov/ncezid/dgmq/feature-stories/welcoming-new...

[patrickg_zill]

Then it isn't "unconditional" to have a fine just for entry, then...

[YokoZar]

The fine isn't for entry, it's for some infraction upon entry (such as being drunk in public). You get in, then they fine you.

That said, American border guards have been known to turn back drunks coming in from Tijuana, but mostly as a favor to them (since they'd need to be arrested upon reentry due to public drunkenness). If you were in such a situation and insisted upon your admittance, however, I believe you would be let in.

[whyenot]

I had to deal with this in Ecuador about a decade ago. I had to always carry around a health certificate showing I was vaccinated against yellow fever or they wouldn't let me enter the eastern Oriente (Amazon) region.

I think it was a good idea. Too bad there's no vaccine against bot flies :(