By the time I sail this December it will have been over a year since my last booster shot and I'm undecided as to whether I will get another one going forward.
I guess that part that confuses me is that the vaccines wane overt time. I would think that they would want a current date stamp on these cards to show that people are up to date on their shots.
Personally, I think the safest thing to do is to have everyone r show a negative test before boarding regardless of vaccination. Vaccines don't prevent Covid.