Menquadfi since it was administered to a patient below 2 years old with no reported adverse event; Initial information received on 22-Jan-2025 regarding an unsolicited valid non-serious case received from a Patient. This case involves a 1 years old female patient (below 2 years old) was administered 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. On 20-Jan-2025, a below2 years old patient was administered (dose 1) (Standard) Meningococcal A-C-Y-W135 (T Conj) Vaccine (frequency-once) (unknown strength, expiry date, batch number and route) in the left thigh for immunization with no reported adverse event (product administered to patient of inappropriate age) (latency-same day). Information on the batch number was requested corresponding to the one at time of event occurrence. Reportedly, Caregiver called to inquire of possible side effects with Menquadfi and how long to look out for possible side effects. 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.