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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.

⚠️

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.

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  3. Varicella (Varivax)
  4. Unevaluable event
Varicella (Varivax)×Unevaluable event

Unevaluable event Reports for Varicella (Varivax)

#64 most reported symptom for this vaccine

848
Reports
17
Deaths
15
Hospitalizations
2
Mortality Rate
%
1.8
Hosp. Rate
%

Unevaluable event and Varicella (Varivax)

Unevaluable event has been reported 848 times in association with Varicella (Varivax) vaccination in VAERS. This represents 0.9% of all 93,126 reports for this vaccine.

Among these reports, 17 mentioned death (2.00%) and 15 involved hospitalization (1.8%).

Unevaluable event is the #64 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 848 reports of Unevaluable event after Varicella (Varivax) vaccination may seem alarming, but context is critical.

The mortality rate of 2.00% warrants monitoring, though VAERS deaths represent temporal associations, not confirmed causal links.

Important Context

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

Malaise876 reportsTenderness869 reportsLocal reaction817 reportsInjection site vesicles801 reports

Quick Facts

Reports:848
Deaths:17
Hospitalizations:15
% of Vaccine:0.9%
Rank:#64 of 2205

Related Pages

Varicella (Varivax) OverviewUnevaluable event (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.