https://techcrunch.com/2021/06/01/eus-covid-19-digital-pass-gateway-system-goes-live/

A technical system underpinning the European Union’s plan for a pan-EU ‘digital pass’ for verifying COVID-19 vaccination or test status across the region has gone live today, with a handful of EU Member States connected to the gateway and more expected to follow ahead of a July 1 full launch.

The idea for the EU’s COVID-19 digital certificate is to offer a single system for securely verifying EU citizens’ COVID-19 status — whether vaccination; a recent negative test; or proof of recovery from the virus — as they cross borders within the bloc to help facilitate safer travel.