While the terms “immunization” and “vaccination” are not clinically identical, for the purposes of the Fast Healthcare Interoperability Resources (FHIR) resources, the terms are used synonymously.
Additionally, the Immunization resource is expected to cover key concepts related to the creation, revision and querying of a patient’s immunization history. This resource – through consultation with the Public Health work group – is believed to meet key use cases and information requirements.
Administration of vaccines is intended to be handled using the Immunization resource. Medication Administration is intended for tracking the administration of non-vaccine medications. Some systems treat immunizations in the same way as any other medication administration. Such systems should use an immunization resource to represent these. If systems need to use a Medication Administration resource to capture vaccinations for workflow or other reasons, they should also expose an equivalent Immunization instance.
Immunization reaction may be an indication of an allergy or intolerance. If this is deemed to be the case, a separate Allergy Intolerance resource instance should be created to indicate it, as most systems will not query against past Immunization reaction.