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Report #2881262

Received Jan 9, 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 yrs
State
IA
Recovered
Unknown
Vaccinated
Dec 29, 2025
Onset
Dec 29, 2025
Days to onset
0
Hospital days
—

Vaccines (1)

TypeNameManufacturerDoseLotRoute / Site
MMRMEASLES + MUMPS + RUBELLA (MMR II)MERCK & CO. INC.UNKZ004812OT

Symptoms (1)

Product storage error

Symptom narrative

Confirmed no symptomatic adverse events.; nurse calling to report a temperature excursion for MMR-II. During the call, the nurse stated that one dose was administered to one patient on 29-DEC-2025; This spontaneous report was received from a Nurse and refers to a 1-year-old female patient. The patient's medical history was not reported. The patient's concurrent conditions were not reported. The MMR-II had excursions that occurred on 07-DEC-2025 and 29-DEC-2025. Temperature: 10.8C. Time frame: 1 Hour. Previous temperature excursion: Yes (11.5C for 2 hours 0 Minutes Seconds). On 29-Dec-2025, the patient was vaccinated with 1 dose of Measles, Mumps, and Rubella (Wistar RA 27-3) Virus Vaccine, Live (M-M-R II), Injection (lot #Z004812, expiration date: 20-Feb-2027) with sterile diluent for prophylaxis (Improper storage of product in use). Confirmed no symptomatic adverse events (no adverse event). Follow up was received from the nurse on 07 Jan 2026. Historical drugs included Pneumococcal vaccine conj 20v (CRM197) (2 doses). Concomitant medications/vaccines included Varicella Virus Vaccine Live (Oka-Merck) (VARIVAX) with sterile diluent (Hollister-Stier STERILE DILUENT), Prevnar 20 (Pneumococcal vaccine conj 20v (CRM197)) and Hepa (Hepatitis a vaccine). The route of Measles, Mumps, and Rubella (Wistar RA 27-3) Virus Vaccine, Live (M-M-R II) was updated as Subcutaneous route. The vaccines were purchased with public funds and given at doctor's office/hospital. The second excursion occurred on 29-DEC-2025 at 7:50 PM. The Measles, Mumps, and Rubella (Wistar RA 27-3) Virus Vaccine, Live (M-M-R II) was given prior to the 2nd excursion but after 1st excursion.

Other medications

Varicella virus vaccine live; PCV 20; HEP A; Sterile Diluent