Report #2880097

Received Dec 30, 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: Unknown
Age: Age unknown
State: —
Recovered: Unknown
Vaccinated: —
Onset: —
Days to onset: —
Hospital days: —

Vaccines (1)

Type	Name	Manufacturer	Dose	Lot	Route / Site
COVID19	COVID19 (COVID19 (PFIZER-BIONTECH))	PFIZER\BIONTECH	1	—	—

Symptoms (1)

Atrial fibrillation

Symptom narrative

Why did I develop afib after the mrna vaccine; This is a spontaneous report received from a Consumer or other non HCP, Program ID. A patient (age and gender not provided) received BNT162b2 omicron (lp.8.1) (COMIRNATY (2025-2026 FORMULA)), as dose 1, single (Batch/Lot number: unknown) for covid-19 immunisation. The patient's relevant medical history and concomitant medications were not reported. Vaccination history included: Mrna covid shots (DOSE 1, SINGLE, MANUFACTURER UNKNOWN), for COVID-19 Immunisation. The following information was reported: ATRIAL FIBRILLATION (medically significant), outcome "unknown", described as "Why did I develop afib after the mrna vaccine". Additional information: Patient reported inquired what happened after the 2 part Mrna covid shots, why did the patient develop afib after the mrna vaccine and why patient not warned about the mrna putting in Abif. No follow-up attempts are possible. Batch/lot number is not provided, and it cannot be obtained.