patient was given expired dose of vaccine with no reported adverse event; Initial information received on 16-Jan-2025 regarding an unsolicited valid non-serious case received from an other health professional. This case involves an unknown age and unknown gender patient who was given expired dose of HIB (PRP/T) Vaccine [ACT-HIB] vaccine with no reported adverse event. The patient’s past medical history, medical treatment(s), vaccination(s) and family history were not provided. On 16-Jan-2025, the patient received an expired dose of suspect HIB (PRP/T) Vaccine Powder and solvent for solution for injection (lot- uk007ab and expiry- 01-Dec-2024) via unknown route in unknown administration site for immunization (dose, strength: not provided) with no reported adverse event (expired product administered) (latency- same day). This suspected adverse reaction report is submitted and classified as a medication error solely and exclusively to ensure the marketing authorization holder’s compliance with the requirements set out in the Directive 2001/83/EC and Module VI of the Good Pharmacovigilance Practices. The classification as a medical error is in no way intended, nor should it be interpreted or construed as an allegation or claim made by the marketing authorization holder that any third party has contributed to or is to be held liable for the occurrence of this medication error.