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Report #2896859

Received May 18, 2026

A note on interpretation. VAERS reports are unverified and may be incomplete or coincidental. A report does not establish that a vaccine caused an event, and counts should not be used to calculate incidence or infer causation. Full disclaimer

Overview

Sex
Female
Age
1.3 yrs
State
PA
Recovered
Unknown
Vaccinated
May 4, 2026
Onset
May 4, 2026
Days to onset
0
Hospital days

Vaccines (1)

TypeNameManufacturerDoseLotRoute / Site
HIBVHIB (ACTHIB)SANOFI PASTEURUNKUK381ABIM / LA

Symptoms (2)

No adverse eventProduct preparation issue

Symptom narrative

ACTHIB was diluted with sterile water (not the ACTHIB diluent) and administered to a patient, with no reported adverse event; Initial information received on 05-May-2026 regarding an unsolicited valid non-serious case received from a healthcare professional (HCP) other. This case involves a 15-month-old female patient and is reported HAEMOPHILUS TYPE B (HIB) VACCINE [ACT-HIB] was diluted with sterile water (not the ACTHIB diluent) and administered to a patient, with no reported adverse event. The patient's past medical history, past drugs, vaccination(s), family history were not provided. Concomitant medication(s) included [Pneumococcal vaccine conj 20v (CRM197) (PREVNAR 20)]. On 04-May-2026, the patient received a 0.5 mL dose 4 once dose of HIB (PRP/T) VACCINE [ACT-HIB] (batch: UK381AB, expiry: 31-Mar-2027) strength: standard via intramuscular route in left arm for Immunization which was diluted with sterile water (not the ACTHIB diluent) and administered to a patient, with no reported adverse event [(Product preparation issue, onset: 04-May-2026 and latency: same day)]. 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 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.

Medical history

Comments: NONE

Other medications

Prevnar 20