Yes, but as I understand it, the EU purports to be a proponent of human rights as well.

Immigration to the U.S. is of course, a regulated activity. They can make you take a physical, pay a fee, inspect your background, call your mom and make sure you're a good person, etc, before accepting you as an immigrant. Sure. There's no limits to that, because there's no U.S. Constitutional protection for non-U.S. citizens and immigration can be stopped altogether if desired (assuming it's enforced).

> There's no limits to that, because there's no U.S. Constitutional protection for non-U.S. citizens

The fourteenth amendment plainly says “people” not citizens. There are others, but this is the most obvious one.

> nor shall any State deprive any person of life, liberty, or property, without due process of law;

I'm not sure why you're talking about immigrating to the EU when my understanding is the topic is simply traveling to the EU as a visitor.

Are any of those vaccines being distributed under an emergency use authorization without FDA approval?

There is no universal right to immigrate to the US, or anywhere else generally, so immigrants can be subject to whatever requirements the local govt decides at any given time. The discussion here was about a supposed "free travel" zone where citizens of member countries are giving up much of their autonomy in return for travel and trade freedoms.

But this kind of arguments are precisely the point when it comes to concern about precedents. It becomes less of a barrier to adding new rules just because the law already has vaguely similar rules.

There is no universal right for citizens of one country to enter another country either, even within the EU (there have always been limitations based on considerations of public security, public policy and public health grounds).

Yes I do believe there is literally a right of free movement:

https://ec.europa.eu/home-affairs/what-we-do/networks/europe...

All rights have limitations of course.

You are right - I should have qualified “even within the EU it is not without restriction”.

https://ec.europa.eu/social/main.jsp?catId=457

Immigration is usually a much higher bar than travel.