Received Jun 9, 2026
| Type | Name | Manufacturer | Dose | Lot | Route / Site |
|---|---|---|---|---|---|
| YF | YELLOW FEVER (YF-VAX) | SANOFI PASTEUR | UNK | — | — |
yellow fever vaccine was prepared with sterile water instead of diluent with no reported adverse event; Initial information received on 03-Jun-2026 regarding an unsolicited valid non-serious case received from other healthcare professional. This case involves a patient of unknown age and unknown gender who received yellow fever vaccine - [YF-VAX] was prepared with sterile water instead of diluent with no reported adverse event. The patient's past medical history, past drugs, vaccination(s), family history, and concomitant medications were not provided. On an unspecified date, the patient received an unknown dose of yellow fever vaccine - solution for injection (batch/lot number: unknown, expiry date: unknown) (strength: unknown) via unknown route in an unknown administration site for prophylactic vaccination [Immunisation] and was prepared with sterile water instead of diluent supplied by the manufacturer, with no reported adverse event (Product preparation issue) (latency: same day). Information on the batch number was requested corresponding to the one at time of event occurrence. Action taken: Not applicable. 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 medication 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.