As the number of people getting vaccinated against Covid-19 rises, it’s time to review the ways that people can prove they have been inoculated when they want to cross international borders. These so-called “vaccine passports” have been in development over the past year and are starting to go through various trials and beta tests. The passports would be used by travelers to supplement their actual national passport and other border-crossing documents as they clear customs and immigration barriers. The goal would be to have your vaccination documented in a way that it could be accepted and understood across different languages and national procedures.

In my blog for Avast, I talk about how these passports (such as the CommonPass open source one being developed above)  could prove to be a solution for travelers crossing borders, but they also come with their own set of challenges