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Report #2870434

Received Nov 4, 2025

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
Unknown
Age
1.3 yrs
State
IL
Recovered
Unknown
Vaccinated
Oct 9, 2025
Onset
Oct 23, 2025
Days to onset
14
Hospital days
—

Vaccines (1)

TypeNameManufacturerDoseLotRoute / Site
MMRMEASLES + MUMPS + RUBELLA (MMR II)MERCK & CO. INC.UNK——

Symptoms (2)

Inappropriate schedule of product administrationNo adverse event

Symptom narrative

No additional AE/no PQC.; Nurse called and reported inadvertent administration of VARIVAX on 09OCT2025 and administration of MMR-II on 23OCT2025 to the same patient. No additional information was known by reporter at time of call. No additional AE/no PQC.; This spontaneous report was received from nurse and refers to a 15-month-old patient of unreported gender. The patient's medical history was not reported. The patient's concurrent conditions were not reported. Concomitant therapies were not reported. On 09-Oct-2025, the patient was vaccinated with Varicella Virus Vaccine Live (Oka-Merck) (VARIVAX) as prophylaxis (lot # and expiration date were not reported) reconstituted with sterile diluent (doses, scheme, route of administration, lot number and expiration dates not reported) On 23-OCT-2025, there was an inadvertent administration of Varicella Virus Vaccine Live (Oka-Merck) (VARIVAX) reconstituted with sterile diluent (dose, route of administration, scheme, lot number, expiration date and indication were not provided) (Inappropriate schedule of product administration). No additional information was known by reporter at time of call. No additional adverse events (AE)/no product quality complaints reported (PQC).

Other medications

Sterile diluent