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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. Injection site cellulitis
Influenza, Seasonal (Flulaval Quadrivalent)×Injection site cellulitis

Injection site cellulitis Reports for Influenza, Seasonal (Flulaval Quadrivalent)

#151 most reported symptom for this vaccine

231
Reports
0
Deaths
17
Hospitalizations
0
Mortality Rate
%
7.4
Hosp. Rate
%

Injection site cellulitis and Influenza, Seasonal (Flulaval Quadrivalent)

Injection site cellulitis has been reported 231 times in association with Influenza, Seasonal (Flulaval Quadrivalent) vaccination in VAERS. This represents 0.4% of all 52,111 reports for this vaccine.

Among these reports, 0 mentioned death (0.00%) and 17 involved hospitalization (7.4%).

Injection site cellulitis is the #151 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 231 reports of Injection site cellulitis after Influenza, Seasonal (Flulaval 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 Injection site cellulitis occurred after vaccination, not that the vaccine caused it.
•Background rates: Injection site cellulitis 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

Migraine234 reportsNasopharyngitis232 reportsBlood pressure increased230 reportsIrritability228 reports

Quick Facts

Reports:231
Deaths:0
Hospitalizations:17
% of Vaccine:0.4%
Rank:#151 of 2354

Related Pages

Influenza, Seasonal (Flulaval Quadrivalent) OverviewInjection site cellulitis (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.