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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. Influenza, Seasonal (Flulaval Quadrivalent)
  4. Central nervous system lesion
Influenza, Seasonal (Flulaval Quadrivalent)×Central nervous system lesion

Central nervous system lesion Reports for Influenza, Seasonal (Flulaval Quadrivalent)

#1060 most reported symptom for this vaccine

12
Reports
2
Deaths
12
Hospitalizations
16.67
Mortality Rate
%
100
Hosp. Rate
%

Central nervous system lesion and Influenza, Seasonal (Flulaval Quadrivalent)

Central nervous system lesion has been reported 12 times in association with Influenza, Seasonal (Flulaval Quadrivalent) vaccination in VAERS. This represents 0.0% of all 52,111 reports for this vaccine.

Among these reports, 2 mentioned death (16.67%) and 12 involved hospitalization (100.0%).

Central nervous system lesion is the #1060 most frequently reported symptom for Influenza, Seasonal (Flulaval Quadrivalent) out of 2354 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 12 reports of Central nervous system lesion after Influenza, Seasonal (Flulaval Quadrivalent) vaccination may seem alarming, but context is critical.

The 16.67% mortality rate among these reports is elevated, but this reflects the severity of the condition itself rather than vaccine causation.

Important Context

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

Joint dislocation12 reportsCSF protein normal12 reportsTendon pain12 reportsGastric disorder12 reports

Quick Facts

Reports:12
Deaths:2
Hospitalizations:12
% of Vaccine:0.0%
Rank:#1060 of 2354

Related Pages

Influenza, Seasonal (Flulaval Quadrivalent) OverviewCentral nervous system lesion (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.