Sealed QR code will facilitate intuitive verification in a matter of seconds
Trusted Digital Identity for

"So-called digital ‘vaccination passports’ will play a key role in enabling citizens to access all manner of services and will act as a precursor to the rollout of mobile digital IDs ––– Covid-19 health passes can open the door to a digital ID revolution ––– The Digital ID Wallet is characterised by the richness and variety of identity-related services it can support ..."
Thales – Building a future we can all trust* 2021 

"When we say digital identity, we have to understand it as the sum of all the attributes that exist about us in the digital world, a constantly growing and evolving collection of data points."

There exists a big interest in a unified digital identity because of the indirect creation of central national or even supranational databases in which all actions of all inhabitants are registered and stored.

From 2018 to 2022 the EU Commission's detailed 'Roadmap on Vaccination' extends, and the first and probably most important point on this roadmap is the vaccination card for all EU citizens, “that is compatible with electronic immunisation information systems and recognized for use across borders". 

The action plan includes above all to counter online vaccine misinformation and to invest in behavioural and social science research on the determinants of vaccine hesitancy. Skills to address hesitant populations and promote behavioural change should be improved. 
European Commission Roadmap on Vaccination 2018-2022

Global Vaccination Summit 
Brussels 2019 by EU Commission co-organized with WHO

G20 2022 – "We acknowledge the importance of shared technical standards to facilitate seamless international travel, ... and endeavour to move towards interoperability of systems including mechanisms that validate proof of vaccination ... build on the success of the existing standards and digital Covid-19 certificates."
G20 members have welcomed the new financial intermediary fund (FIF) for pandemic prevention, preparedness, and response (PPR). The PPR FIF/Pandemic Fund is hosted by the World Bank, and has been established in close collaboration with the WHO which, as the lead international technical agency and custodian of the IHR (International Health Regulations), will play a central role in this Pandemic Fund. 
G20 Bali Declaration 2022 p.37,14
Marc van Ranst reports on his 2009 swine flu communication –– at CHATHAM HOUSE, London 2019
* Thales Group is a publicly traded defense group with activities in military technology, aerospace, security and transportation.
Vault 0 /The Known Traveller Digital Identity/  
Vault 1 /ID 2020 + Good Health Pass Collaborative/
Vault 3 /Simulating Pandemics: The Lockstep Scenario/ 
Vault 4 /Pandemic Exercises + The Global Digital Health Certificate/