Physical vaccine vial/lot expiration date (distinct from the next-due DateTime? UpdateVaccinationRecordRequest.ExpirationDate).

Reassign who physically gave the dose. Null = leave unchanged; to CLEAR back to "not recorded / external", set bool UpdateVaccinationRecordRequest.NoAdministeredBy.

True = clear the administering staff member to "not recorded / external". Wins over string? UpdateVaccinationRecordRequest.AdministeredById.

Reassign the DVM of record. Null = leave unchanged; to CLEAR to "no doctor", set bool UpdateVaccinationRecordRequest.NoDoctorOfRecord.

True = clear the doctor of record (dose certifies unsigned). Wins over string? UpdateVaccinationRecordRequest.DoctorOfRecordId.

Next-due date (when the current dose lapses). Not the vial expiry — see DateTime? VaccinationRecordDto.VaccineExpirationDate.

Physical vaccine vial/lot expiration date (distinct from the next-due DateTime? VaccinationRecordDto.ExpirationDate).

True when the underlying inventory lot is a temporary placeholder awaiting resolution. Certificate generation is blocked while this is true.

True when the dose was retracted (billing line voided, or a mis-entry corrected). The record stays on the chart for audit but is not a valid dose: it drives no reminders, does not count toward vaccination status or schedule stage, and cannot be certified. Render it struck through.