When you get the vaccine, they give you the little card with the dates you received your vaccine... why would you need anything else?... this is the proof that you would need to show when boarding a plane or a cruise ship... If people want to cruise and have had the vaccine, and follow the rules on board, its no different from getting on a plane or going to a theme park. So open the cruise lines, and lets get on with it...
Who is suppose to issue this Vaccine passport? and what is that going to cost? and who is suppose to pay for it?
As well their are Hippa laws in place to protect everyone medical privacy?