Received Oct 9, 2025
| Type | Name | Manufacturer | Dose | Lot | Route / Site |
|---|---|---|---|---|---|
| YF | YELLOW FEVER (YF-VAX) | SANOFI PASTEUR | UNK | — | OT |
error made in the diluent of the YF-VAX, instead of sodium chloride, the provider used sterile water with no reported adverse event; Initial information received on 06-Oct-2025 regarding an unsolicited valid non-serious case received from a pharmacist. This case involves a patient with unknown age and gender and an error was made in the diluent of the Yellow Fever Vaccine [Yf-Vax], instead of sodium chloride, the provider used sterile water with no reported adverse event. The patient's past medical history, medical treatment(s), vaccination(s) and family history were not provided. On an unknown date, the patient received an unknown dose of suspect Yellow Fever Vaccine, Solution for injection (lot number, expiry date and strength not reported) via unknown route in unknown administration site for prophylactic vaccination (Immunisation) and error made in the diluent of the yf-vax, instead of sodium chloride, the provider used sterile water with no reported adverse event (product preparation error). Reportedly, she wanted to know if there was a need to revaccinate and If yes, what interval did the patient need to wait. Action taken was 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 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.