Originally Posted by
Mountain Explorer
I read that a couple of times but I can't figure out what you're trying to ask. So let me break it down for you:
If a country you are going to requires proof of vaccine, then you will need to bring proof of vaccine.
If a country you are going to requires a negative test result, then you will need to bring a negative test result.
It is actually worse than that, at least in theory. In Germany for example there are state specific rules, so when entering you have to follow the national rules and then the state rules. And to add insult to injury, things change frequently. In practice, nobody seems to care, i.e. ask for anything, when you enter the country. So what you need is really what Delta asks you to provide/ lets you get away with.
Once you are in the country, you need proof of vaccination to go to restaurants, museums, and to take a plane, maybe more. All kinds of proof are acceptable, the US CDC card works almost everywhere in Germany, in France they ask for QR code.