I am on MyAlberta. It's riddled with errors and poor tracking. I personally have vaccinations missing from that registry, and no they were not done in a back alley they were done in a clinic. Aside from MyAlberta faults, most vaccines just require you to show up with your health care card (or even number), with your history not checked before administering vaccine. So yes there are many holes in the passport plan. And that's just speaking locally. It's a million times more complex if we start talking about international vaccine passports and hoping that say South America will acknowledge my MyAlberta app, or even MyCanada or whatever comes if this goes federal. IMO it's not going to happen.