Immunity Passports and AI: Traceability between Public Health and State Control
The global management of health crises has generated an unprecedented technological infrastructure. What if digital certificates and "immunity passports" were p
The 2020 pandemic emergency left behind an unprecedented technological infrastructure: digital health certificates, often improperly called "immunity passports." While initially the challenge was purely medical, by 2026 the debate has shifted to data governance.
What happens when a simple QR code attesting to a vaccination or health status is integrated into Artificial Intelligence networks designed for digital identity, predictive analytics, and social risk assessment?
In this in-depth analysis from Scenari e Riflessioni, we will examine the delicate boundary between the necessary protection of public health and the risk of permanent state control, exploring the engineering of tracking and the dangerous phenomenon of function creep.
1. From Health to Identity: The Tracking Infrastructure
By itself, an immunity passport is not Artificial Intelligence. The WHO guidelines on digital documentation of COVID-19 certificates describe public-key cryptographic systems to guarantee the authenticity of a document.
The short-circuit with AI occurs when these certificates become the input for sorting algorithms. The natural evolution of these systems is the WHO Global Digital Health Certification Network, a global network that, while not storing data centrally, standardizes the way nations verify the health of travelers.
The critical issue emerges when health certification (showing a pass to board a train) merges with mobility surveillance (cross-referencing train check-ins with financial transactions). As highlighted in a strict Stanford Law School document on Immunity Passports, Tracking, and Data Governance, the algorithm does not merely read the QR code; it can infer information about our social network, our schedules, and our presumed "reliability," transforming a clinical data point into a behavioral risk score.
2. Centralization vs. Decentralization: Who Owns the Data?
The technical debate on how to build these infrastructures is intimately linked to a political choice. The WHO ethical guidelines on digital contact tracing and the European Data Protection Board (EDPB) in its directives on location data impose the principle of data minimization.
However, practical implementation branches into two opposing architectures:
| Architecture | How It Works | Privacy Risk | Advantage for the State |
| Decentralized | The contact log remains encrypted on the user's individual smartphone. | Low (the algorithm does not know where the user is or whom they meet). | Less capacity for mass predictive profiling. |
| Centralized | Contact/movement data is uploaded to a government server. | Very high (possibility of mapping the entire social network of the country). | Creation of enormous datasets to train predictive AI models. |
The guidelines on interoperability of applications (EDPB) confirm that secure systems must exchange only "anonymous keys," without ever reconstructing an archive of physical movements. If AI takes over to perform predictive profiling (e.g., denying access to an area to a healthy citizen simply because the algorithm estimates that, based on their movement history, they "might" get sick), this crosses into technological determinism.
3. Function Creep and the Normalization of Surveillance
The most alarming sociological aspect of immunity passports, as highlighted in PMC studies on the scientific and ethical feasibility of immunity passports, is the so-called function creep.
Function creep occurs when a technology developed for an emergency becomes a permanent, ordinary control infrastructure. In-depth analyses on vaccine passports and political legitimacy raise a vital question: if citizens get used to showing a QR code to exercise fundamental rights (work, transportation, education), what will prevent governments from also including tax data or criminal records in that QR code?
To curb this risk, the Royal Society has drawn up Twelve criteria for vaccine passports. Among the most important are the sunset clause (the system must be shut down at the end of the emergency), the guarantee of equitable access (not discriminating against those without a smartphone), and the absolute prohibition on transforming the certificate into a generalized digital identity.
Key Operational Points (Takeaways for Policy Makers)
- Avoid GPS Tracking (Location Data): As required by international directives, health monitoring systems must use proximity networks (such as Bluetooth Low Energy) and not satellite tracking, preventing the State from archiving citizens' geographic routes.
- Decoupling: Medical databases must remain physically and cryptographically separate from police, tax, or transportation databases. If AI has access to all data pools simultaneously, total surveillance is inevitable.
- Right to an Analog Alternative: Any digital infrastructure that conditions access to public places or job opportunities must always provide a non-traceable paper alternative, to avoid the social exclusion of the elderly or marginalized groups.
FAQ: Understanding Digital Certificates and AI
1. Is the WHO building a global database with our health data?
No. The Global Digital Health Certification Network (GDHCN) established by the WHO does not collect or store citizens' personal data or medical records. It functions as a "signature registry" (Gateway) that allows one nation to mathematically verify whether a certificate issued by another nation is authentic, without reading medical content beyond what is strictly shown.
2. What is "Function Creep"?
It is the tendency (often governmental or corporate) to use a technology introduced for a specific and urgent purpose (e.g., tracking a disease outbreak) for different purposes not declared at the outset (e.g., monitoring who attends a protest or who evades taxes).
3. Why is the Immunity Passport not Artificial Intelligence?
The passport itself is merely an encrypted document (like a secured PDF). Artificial Intelligence comes into play when authorities cross-reference billions of these passports (and their associated scan times at turnstiles, airports, or shops) with other databases to train neural networks capable of predicting or controlling the behavior and movements of the masses.
Conclusions: The Invisible Algorithmic Customs
Immunity passports have forced us to confront a brutal trade-off: trading our geographic and relational privacy in exchange for freedom of movement and health security. This transaction, however necessary during a pandemic, leaves formidable technological infrastructures in its wake.
The problem does not lie in the State knowing whether we are vaccinated or not. The real danger is triggered when digital certificates merge with Artificial Intelligence engines for predictive analysis. If we allow the exception to become the rule, we will no longer have to fear physical customs at national borders; we will be surrounded by invisible algorithmic customs at every street corner, ready to assess our "risk score" before letting us catch a train or enter an office.
Bibliographic References and Sources
- Institutional Guidelines and Basic Architecture:
- Privacy, Traceability, and Decentralization:
- Ethical Governance, Function Creep, and Civil Rights:
Article by the Editorial Team of La Bussola dell'IA