Retrieve Health Certificate

A verifier (point-of-care application or any authorized application outside of the HIE) can use this transaction to verify a Digital Documentation COVID Certificate (DDCC) Immunization event. This may include COVID immunizations and negative tests.

Workflow Maturity	Newly Defined	Workflow is defined by WHO and has OpenHIE ARB approval Initial implementations are being considered.
Standards		The Retrieve Health Certificate transaction is based on MHD's Retrieve Document transaction [ITI-68]. It can be used to verify the contents of a DDCC Immunization event.
Assumptions and Prerequisites		The appropriate trust agreements and processes have been put in place for the Verifier to receive the certificate. The appropriate transactions denoting health certificate status have been stored. This may include saving a vaccine or a lab test event to a shared health record via Save Patient-level Clinical Data Workflow.
Actors		Verifier (External System) - External system or Point-of-care system requesting the vaccine status. IOL - The interoperability layer that secures and orchestrates the exchange of information (see OHIE Interoperability layer) SHR (or Vaccine Service Repository) - The shared health record that serves as a centralized data store for patients’ longitudinal health record

Interaction Description

The Interaction Description is stored in the "Retrieve Health Certificate Reference" in the WHO FHIR IG.

References: WHO DDCC Workflows