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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 (Fluad Quadrivalent)
  4. Lymphadenopathy
Influenza, Seasonal (Fluad Quadrivalent)×Lymphadenopathy

Lymphadenopathy Reports for Influenza, Seasonal (Fluad Quadrivalent)

#94 most reported symptom for this vaccine

33
Reports
0
Deaths
1
Hospitalizations
0
Mortality Rate
%
3
Hosp. Rate
%

Lymphadenopathy and Influenza, Seasonal (Fluad Quadrivalent)

Lymphadenopathy has been reported 33 times in association with Influenza, Seasonal (Fluad Quadrivalent) vaccination in VAERS. This represents 0.8% of all 4,184 reports for this vaccine.

Among these reports, 0 mentioned death (0.00%) and 1 involved hospitalization (3.0%).

Lymphadenopathy is the #94 most frequently reported symptom for Influenza, Seasonal (Fluad Quadrivalent) out of 673 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 33 reports of Lymphadenopathy after Influenza, Seasonal (Fluad Quadrivalent) vaccination may seem alarming, but context is critical.

The mortality rate among these reports is very low at 0.00%, suggesting most cases are non-fatal.

Important Context

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

Abdominal pain34 reportsHypoxia34 reportsDiscomfort33 reportsChest X-ray normal33 reports

Quick Facts

Reports:33
Deaths:0
Hospitalizations:1
% of Vaccine:0.8%
Rank:#94 of 673

Related Pages

Influenza, Seasonal (Fluad Quadrivalent) OverviewLymphadenopathy (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.