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Report #2892910

Received Apr 15, 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
Male
Age
1.3 yrs
State
AZ
Recovered
Unknown
Vaccinated
Apr 15, 2026
Onset
Apr 15, 2026
Days to onset
0
Hospital days

Vaccines (2)

TypeNameManufacturerDoseLotRoute / Site
MMRVMEASLES + MUMPS + RUBELLA + VARICELLA (PROQUAD)MERCK & CO. INC.1Z014047SC / LL
VARCELVARICELLA (VARIVAX)MERCK & CO. INC.1Z017019SC / RL

Symptoms (2)

Extra dose administeredNo adverse event

Symptom narrative

Vaccine administration error: At 15-month well visit, child received ProQuad (measles, mumps, rubella, varicella vaccine) plus an additional MMR dose in error, instead of the intended separate MMR and varicella vaccines. No adverse effects were observed or reported yet to the primary care office. Parents have not been accessible via phone call at the time of this report, approximately 3 hours after administration. Medication administration error was detected at the time of reconciliation of vaccinations administered over the course of the day.

Current illness

No

Medical history

No

Other medications

No

Allergies

No

Lab data

NONE