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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. Syncope
Varicella (Varivax)×Syncope

Syncope Reports for Varicella (Varivax)

#47 most reported symptom for this vaccine

1,214
Reports
1
Deaths
48
Hospitalizations
0.08
Mortality Rate
%
4
Hosp. Rate
%

Syncope and Varicella (Varivax)

Syncope has been reported 1,214 times in association with Varicella (Varivax) vaccination in VAERS. This represents 1.3% of all 93,126 reports for this vaccine.

Among these reports, 1 mentioned death (0.08%) and 48 involved hospitalization (4.0%).

Syncope is the #47 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 1,214 reports of Syncope after Varicella (Varivax) vaccination may seem alarming, but context is critical.

The mortality rate among these reports is very low at 0.08%, suggesting most cases are non-fatal.

Important Context

•Association, not causation: These reports show Syncope occurred after vaccination, not that the vaccine caused it.
•Background rates: Syncope 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

Injection site oedema1,264 reportsNausea1,236 reportsPallor1,184 reportsIncorrect storage of drug1,160 reports

Quick Facts

Reports:1,214
Deaths:1
Hospitalizations:48
% of Vaccine:1.3%
Rank:#47 of 2205

Related Pages

Varicella (Varivax) OverviewSyncope (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.