No shots...not getting in.

FWC wrote:
The problem I see with this, is how does the Canadian Border Service Agency, or any other foreign government access these databases?

bgum wrote:
In the US each state maintains a database containing name, date of first shot, date of second shot, name of manufacturer, and lot number.

This how the million dollar lottery has confirmed winners. The same could be used at borders to verify shot cards.

Canada, nor anyone else for that matter, needs access to the US database. It would be a simple thing to have a secure website that would generate a QR code (displayed on your smartphone, tablet, even printed out for that matter, whereby the QR code is scanned along with your passport and the system generates a ‘go / no go’ reply.