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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.

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  3. Influenza, Seasonal (Flucelvax Quadrivalent)
  4. Product quality issue
Influenza, Seasonal (Flucelvax Quadrivalent)×Product quality issue

Product quality issue Reports for Influenza, Seasonal (Flucelvax Quadrivalent)

#205 most reported symptom for this vaccine

26
Reports
0
Deaths
0
Hospitalizations
0
Mortality Rate
%
0
Hosp. Rate
%

Product quality issue and Influenza, Seasonal (Flucelvax Quadrivalent)

Product quality issue has been reported 26 times in association with Influenza, Seasonal (Flucelvax Quadrivalent) vaccination in VAERS. This represents 0.3% of all 8,852 reports for this vaccine.

Among these reports, 0 mentioned death (0.00%) and 0 involved hospitalization (0.0%).

Product quality issue is the #205 most frequently reported symptom for Influenza, Seasonal (Flucelvax Quadrivalent) out of 844 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 26 reports of Product quality issue after Influenza, Seasonal (Flucelvax 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 Product quality issue occurred after vaccination, not that the vaccine caused it.
•Background rates: Product quality issue 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

Dysphonia26 reportsInjection site vesicles26 reportsSkin discolouration25 reportsBlister25 reports

Quick Facts

Reports:26
Deaths:0
Hospitalizations:0
% of Vaccine:0.3%
Rank:#205 of 844

Related Pages

Influenza, Seasonal (Flucelvax Quadrivalent) OverviewProduct quality issue (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.