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Report #2888162

Received Mar 9, 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
Female
Age
Age unknown
State
MO
Recovered
Unknown
Vaccinated
Mar 8, 2026
Onset
Mar 9, 2026
Days to onset
1
Hospital days
—

Vaccines (1)

TypeNameManufacturerDoseLotRoute / Site
PNC20PNEUMO (PREVNAR20)PFIZER\WYETH1MM0527IM / LL

Symptoms (8)

Blood cultureBlood electrolytesBody temperature increasedElectroencephalogramFull blood countLumbar punctureMagnetic resonance imagingSeizure

Symptom narrative

Vaccine given on 3/8/26 at 3:45 pm. Infant spike temperature of 100.6F at 2am, temperature remained at 3:15am. Dose of acetaminophen was given at 4:02am. Infant's temperature was normalized at 5 am. Infant was observed by physician to be having a seizure at 6am. Seizure lasted approximately 2 minutes and infant required additional respiratory support.

Medical history

Infant is a twin. Born preterm at 32 weeks gestation. Vaccine was administered in hospital under close monitoring.

Other medications

omeprazole, infant multi-vitamin with iron

Allergies

Had previous reaction to Hepatitis B vaccine. Event reported separately.

Lab data

3/9/2026: CBC, electrolytes, aEEG, EEG, blood cultures, lumbar puncture,, 3/10/26: MRI

Prior vaccinations

Hepatitis B (Engerix B)- fever, rash, tachycardia