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Report #2884601

Received Feb 6, 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
Unknown
Age
Age unknown
State
CA
Recovered
Unknown
Vaccinated
Jun 17, 2025
Onset
Jun 17, 2025
Days to onset
0
Hospital days
—

Vaccines (1)

TypeNameManufacturerDoseLotRoute / Site
MMRVMEASLES + MUMPS + RUBELLA + VARICELLA (PROQUAD)MERCK & CO. INC.UNKY019464—

Symptoms (1)

No adverse event

Symptom narrative

No additional AE/PQC; a patient who was administered improperly stored PROQUAD; This Spontaneous report was received from a nurse and referred to a patient of unknown age and gender. The patient's medical history was not reported. The patient's past medications were not reported. The patient's concomitant medications were not reported. On 16-Jun-2025, vaccine of Measles, Mumps, Rubella and Varicella (Oka-Merck) Virus Vaccine Live (PROQUAD) was improperly stored at Temperature: 77.7 Fahrenheit (F) for 0 Hours 5 Minutes 0 Seconds. No previous temperature excursion. On 17-Jun-2025, the patient was vaccinated with above Measles, Mumps, Rubella and Varicella (Oka-Merck) Virus Vaccine Live (PROQUAD) (0.50 mL/dose, Lot Number: Y019464, Expiration date expiration date reported as 10-Nov-2026, but upon internal validation established as 24-May-2026; strength and route were not reported) for prophylaxis (Product storage error). The vaccine was reconstituted with sterile diluent (Hollister-Stier STERILE DILUENT). No additional adverse event (AE)/ product quality complaints (PQC) (No adverse event). Lot number for sterile diluent (Hollister-Stier STERILE DILUENT) is being requested and will be submitted if received.

Other medications

sterile diluent