We need to be extremely careful about vaccination passports. I find the idea a little premature. If we give out vaccination passports, what do they show?
We are still not sure about the duration of the immunity that vaccines provide. Some people may have had one dose and others two. Will the immunity last six months, eight months? If you want to use a vaccination passport in order to travel, but you were vaccinated a year ago and you no longer have any antibodies, what significance does it have?
Before we talk about a vaccination passport, I would like to have data about the duration of the immunity that the vaccines provide and about the extent of their effectiveness. That would reassure me that the passport actually means that the person is immunized and protected and will not therefore be spreading the virus in other countries.