This code system http://terminology.hl7.org/CodeSystem/immunization-evaluation-dose-status defines the following codes:

CodeDisplayDefinition
valid ValidThe dose counts toward fulfilling a path to immunity for a patient, providing protection against the target disease.
notvalid Not validThe dose does not count toward fulfilling a path to immunity for a patient.
 <status value="draft"/> <experimental value="false"/> <date value="2022-11-04T18:21:49-06:00"/> <publisher value="FHIR Project team"/> <contact> <telecom> <system value="url"/> <value value="http://hl7.org/fhir"/> </telecom> </contact> <description value="The value set to instantiate this attribute should be drawn from a terminologically robust code system that consists of or contains concepts to support describing the validity of a dose relative to a particular recommended schedule. This value set is provided as a suggestive example."/> <caseSensitive value="true"/> <valueSet value="http://terminology.hl7.org/ValueSet/immunization-evaluation-dose-status"/> <content value="complete"/> <concept> <code value="valid"/> <display value="Valid"/> <definition value="The dose counts toward fulfilling a path to immunity for a patient, providing protection against the target disease."/> </concept> <concept> <code value="notvalid"/> <display value="Not valid"/> <definition value="The dose does not count toward fulfilling a path to immunity for a patient."/> </concept> </CodeSystem>