I'm a fully vaccinated US citizen who plans to travel USA-->Italy-->Portugal-->USA. Will a Green Certificate allow me to do this? How do I get one? What do I need in order to return to the USA?
Also, I have the little CDC card I received at vaccination. Do I need to carry this with me to the airport, or will they accept a photo of both sides?
Is there some official clearinghouse of information that addresses these kinds of questions? I hate to be a bother.
Thank you!