I will be travelling from Sweden directly to the USA under the current travel restrictions. I understand that at the moment, this requires you to be fully vaccinated. What's not clear however is how I will prove that I am vaccinated and tested.
Is the PDF I get from https://covidbevis.se/vaccinationsbevis-web/ all I need to prove my vaccination status, or is there more to it? How does it work for testing? When will I need to show this proof, at the airport before boarding, or on arrival? Both?