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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. Posture abnormal
Influenza, Seasonal (Flucelvax Quadrivalent)×Posture abnormal

Posture abnormal Reports for Influenza, Seasonal (Flucelvax Quadrivalent)

#172 most reported symptom for this vaccine

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

Posture abnormal and Influenza, Seasonal (Flucelvax Quadrivalent)

Posture abnormal has been reported 33 times in association with Influenza, Seasonal (Flucelvax Quadrivalent) vaccination in VAERS. This represents 0.4% of all 8,852 reports for this vaccine.

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

Posture abnormal is the #172 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 33 reports of Posture abnormal 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 Posture abnormal occurred after vaccination, not that the vaccine caused it.
•Background rates: Posture abnormal 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

Dyskinesia33 reportsRotator cuff syndrome33 reportsVaccination complication32 reportsBody temperature increased32 reports

Quick Facts

Reports:33
Deaths:0
Hospitalizations:1
% of Vaccine:0.4%
Rank:#172 of 844

Related Pages

Influenza, Seasonal (Flucelvax Quadrivalent) OverviewPosture abnormal (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.