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Transparent access to VAERS data for informed decision-making. We present the data as-is, with appropriate context and disclaimers.

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Data source: VAERS (Vaccine Adverse Event Reporting System)

Data through 2026 · Updated quarterly

Built by TheDataProject.ai · © 2026 VaccineWatch

Important: VAERS accepts reports of adverse events following vaccination. For any given report, there is no certainty that the reported event was caused by the vaccine. Reports may contain information that is incomplete, inaccurate, coincidental, or unverifiable. Most reports to VAERS are voluntary, which means they are subject to biases. This data cannot be used to determine if vaccines cause or contribute to adverse events.

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Important: VAERS reports alone cannot determine if a vaccine caused an adverse event. Reports may contain incomplete, inaccurate, or unverified information. Correlation does not equal causation.

  1. Home
  2. Vaccines
  3. Varicella (Varivax)
  4. Seizure
Varicella (Varivax)×Seizure

Seizure Reports for Varicella (Varivax)

#131 most reported symptom for this vaccine

282
Reports
5
Deaths
77
Hospitalizations
1.77
Mortality Rate
%
27.3
Hosp. Rate
%

Seizure and Varicella (Varivax)

Seizure has been reported 282 times in association with Varicella (Varivax) vaccination in VAERS. This represents 0.3% of all 93,126 reports for this vaccine.

Among these reports, 5 mentioned death (1.77%) and 77 involved hospitalization (27.3%).

Seizure is the #131 most frequently reported symptom for Varicella (Varivax) out of 2205 total symptoms.

Disclaimer: VAERS reports describe events that occurred after vaccination but do not establish that the vaccine caused the event. Many reported symptoms may be coincidental or related to underlying conditions.

What This Means

Seeing 282 reports of Seizure after Varicella (Varivax) vaccination may seem alarming, but context is critical.

The mortality rate of 1.77% warrants monitoring, though VAERS deaths represent temporal associations, not confirmed causal links.

Important Context

•Association, not causation: These reports show Seizure occurred after vaccination, not that the vaccine caused it.
•Background rates: Seizure may occur naturally at baseline rates in the population, unrelated to vaccination.
•Anyone can report: VAERS accepts reports from anyone — patients, parents, healthcare providers — without requiring medical verification.
•Denominator missing: VAERS counts reports, not rates per dose. Without knowing how many doses were given, raw counts can be misleading. Learn more →

Similarly Ranked Symptoms

Local swelling284 reportsAbdominal pain upper282 reportsErythema multiforme281 reportsSkin discolouration279 reports

Quick Facts

Reports:282
Deaths:5
Hospitalizations:77
% of Vaccine:0.3%
Rank:#131 of 2205

Related Pages

Varicella (Varivax) OverviewSeizure (All Vaccines)Why Raw Numbers MisleadTop Symptoms Analysis

Data Source

This data comes from the Vaccine Adverse Event Reporting System (VAERS), jointly managed by CDC and FDA.