Report #2859139

Received Sep 16, 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: 11 yrs
State: PA
Recovered: Recovered
Vaccinated: Sep 4, 2025
Onset: Sep 4, 2025
Days to onset: 0
Hospital days: —

Vaccines (2)

Type	Name	Manufacturer	Dose	Lot	Route / Site
MNQ	MENINGOCOCCAL CONJUGATE (MENQUADFI)	SANOFI PASTEUR	N/A	U8600AA	IM / RA
TDAP	TDAP (ADACEL)	SANOFI PASTEUR	N/A	U8670BA	IM / LA

Symptoms (5)

Confusional stateFeeling hotHyperhidrosisPresyncopeSyncope

Symptom narrative

After administration of both Menquadfi and Tdap, patient has syncopal episode approx less than 30 seconds after the Menquadfi. Awoke confused as to what had happened. Warm and diaphoretic. Re-oriented quickly. Evaluated by provider- "Suspect vasovagal response". Patient monitored. No further issues. Mother present throughout.

Current illness

Constipation

Medical history

Pre-term. Developmental delay. Dental caries. Seasonal allergies.

Other medications

multivitamin with iron, fiber gummies, probiotic, melatonin

Allergies

seasonal/ environmental allergies

Lab data

None. Phone call follow up to patient/ mother. Mother states that he is doing much better since his visit. No recurrent episodes. Added note to patient chart- "Please make sure patient is seated in chair and observed after immunizations in the future due to atypical vaccine reaction".