Our country uses the https://en.wikipedia.org/wiki/International_Certificate_of_Vaccination_or_Prophylaxis https://en.wikipedia.org/wiki/International_Certifica

Our country uses the https://en.wikipedia.org/wiki/International_Certificate_of_Vaccination_or_Prophylaxis https://en.wikipedia.org/wiki/International_Certificate_of_V... so it's not dissimilar to measels or yellow fever. Meant as prove vaccination, not immunity. Of course alternatively, if you don't have your "yellow card" (actually a booklet) afaik they also have a paper document. How that document is accepted for travel is still open. I remember I needed it for several countries in Africa (yellow fever) in the past. There is no regulation asking people to carry it all the time like driver licences.