Report #2867455

Received Oct 21, 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: 10 yrs
State: WA
Recovered: Unknown
Vaccinated: Oct 16, 2025
Onset: Oct 16, 2025
Days to onset: 0
Hospital days: —

Vaccines (1)

Type	Name	Manufacturer	Dose	Lot	Route / Site
COVID19	COVID19 (COVID19 (MODERNA))	MODERNA	UNK	3052741	IM / LA

Symptoms (1)

Incorrect dose administered

Symptom narrative

An incorrect vaccine formulation was administered, resulting in a higher-than-authorized dose for the patient. The patient received Moderna Spikevax 12+ years (0.5mL) instead of the intended Moderna Spikevax 6 months?11 years (0.25mL) formulation. Following discovery of the error, I contacted both the vaccine manufacturer (Moderna) and the CDC for guidance. Per their recommendation, the administered dose is considered valid, and no repeat vaccination is required. The patient may, however, experience increased side effects such as fever, fatigue, headache, or localized injection site reactions. ? Will notify patient?s parent of the incident and advised on possible side effects, symptom monitoring, and when to seek medical attention if needed.