{description: The vaccine preventable disease being evaluated against, package_name: hl7.fhir.r4b.core, name: target-disease, type: token, package_version: 4.3.0, class: unknown, kind: null, url: 'http://hl7.org/fhir/SearchParameter/ImmunizationEvaluation-target-disease', version: 4.3.0}