Received May 27, 2026
| Type | Name | Manufacturer | Dose | Lot | Route / Site |
|---|---|---|---|---|---|
| YF | YELLOW FEVER (YF-VAX) | SANOFI PASTEUR | UNK | — | — |
patient was administered a dose of YF-VAX after diluting it with sterile water instead of the provided diluent with no reported adverse event; Initial information received on 15-May-2026 (With live follow up attached on 20-May-2026) regarding an unsolicited valid non-serious case received from a health care professional. This case involves a female patient of unknown age who experienced that the patient was administered a dose of Yellow Fever Vaccine - (YF-Vax) after diluting it with sterile water instead of the provided diluent with no reported adverse event. The patient's past medical history, medical treatment(s), vaccination(s), and family history were not provided. On an unspecified date, the patient received 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 immunization [Immunisation] after diluting it with sterile water instead of the provided diluent with no reported adverse event (Product preparation issue) (Latency same day). Patient had received her previous dose back in 1995. 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.
Comments: NONE