Report #2841844

Received May 20, 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: Male
Age: 1.3 yrs
State: ID
Recovered: Unknown
Vaccinated: May 19, 2025
Onset: May 19, 2025
Days to onset: 0
Hospital days: —

Vaccines (2)

Type	Name	Manufacturer	Dose	Lot	Route / Site
MMRV	MEASLES + MUMPS + RUBELLA + VARICELLA (PROQUAD)	MERCK & CO. INC.	2	Y019465	SC / RL
VARCEL	VARICELLA (VARIVAX)	MERCK & CO. INC.	2	Y017062	SC / LL

Symptoms (2)

Extra dose administeredNo adverse event

Symptom narrative

On 05/19/2025 patient presented to clinic for vaccination. Patient was to receive MMR & Varicella. Patient was given Varivax and Proquad was mistakenly grabbed and administered rather than MMR II. No side effects have been reported by parent. Vaccines were administered at 09:37AM 05/19/2025. Discovered 1:00PM 05/19/2025. Provider notified. Manufacturer Merck & Co contacted and reported that adverse event according to product warning label likelihood is increased with the double dose of Varicella Vaccination. Parent notified of increased risk for fever, injection site reaction, rash. Advised on s/s to watch for.

Current illness

N/A

Medical history

N/A

Other medications

N/A

Allergies

N/A