This is the ValueSet that contains all the codes in Vaccination Protocol Dose Status Reason codes (http://hl7.org/fhir/ValueSet/vaccination-protocol-dose-status-reason) and Vaccination Protocol Dose Status Reason codes (http://hl7.org/fhir/ValueSet/vaccination-protocol-dose-status-reason). E.g. what you have to deal with if you get resources containing codes in either of them