inappropriate use due to administration of expired MENQUADFI to patient with no reported adverse event; Initial information received on 24-Jan-2025 regarding an unsolicited valid non-serious case received from a other health professional. This case linked to US-SA-2025SA024785 (cluster) This case involves a 11 years old male patient who had inappropriate use due to administration of expired Meningococcal A-C-Y-W135 (T Conj) Vaccine [Menquadfi] with no reported adverse event. The patient’s past medical history, medical treatment(s), vaccination(s) and family history were not provided. Concomitant medications included Diphtheria vaccine toxoid, Pertussis vaccine acellular 5-component, Tetanus vaccine toxoid (Adacel); Influenza vaccine (Fluzone) and HPV vaccine VLP rL1 9v (yeast) (Gardasil 9) for Immunisation. On 23-Jan-2025, inappropriate use due to administration of expired dose (0.5 ml) of Meningococcal A-C-Y-W135 (T Conj) Vaccine, Solution for injection (lot U7540BD; expiry date: 31-Dec-2024) via unknown route in the left arm for Immunisation 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.; Sender’s Comments: US-SA-2025SA024785:02386845