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 yrs
State
—
Recovered
Unknown
Vaccinated
Oct 31, 2025
Onset
Oct 31, 2025
Days to onset
0
Hospital days
—
Vaccines (1)
Type
Name
Manufacturer
Dose
Lot
Route / Site
MMRV
MEASLES + MUMPS + RUBELLA + VARICELLA (PROQUAD)
MERCK & CO. INC.
1
YO14435
SC / LA
Symptoms (1)
Wrong product administered
Symptom narrative
Patient was administered MMRV instead of MMR vaccine at his routine well-child visit.