There’s already an International standard vaccination card (WHO yellow card), and some countries require proof of various vaccines to enter. I have one. https:

There’s already an International standard vaccination card (WHO yellow card), and some countries require proof of various vaccines to enter. I have one. https://en.m.wikipedia.org/wiki/International_Certificate_of_Vaccination_or_Prophylaxis https://en.m.wikipedia.org/wiki/International_Certificate_of... This isn’t new to SARS-CoV-2.