Skip to main content
VaccineWatch
VaccinesSymptomsStatesAnalysisToolsDashboardCompare

VaccineWatch

Transparent access to VAERS data for informed decision-making. We present the data as-is, with appropriate context and disclaimers.

Explore Data

  • Vaccines
  • Symptoms
  • Manufacturers
  • States
  • Dashboard
  • Compare Tool
  • Search

Deep Dives

  • The Denominator Problem
  • Onset Timing
  • Lot Number Analysis
  • COVID Impact
  • Myocarditis
  • Death Reports
  • Interactive Tools
  • All 23 Articles →

Resources

  • About
  • Methodology
  • FAQ
  • Glossary
  • Side Effects Guide
  • Vaccine Schedule
  • Vaccine Safety
  • Safety Timeline
  • Adverse Events
  • Is VAERS Reliable?
  • Report an Event
  • Disclaimer
  • VAERS Official Site ↗

Sister Sites

  • OpenMedicaid
  • OpenFeds
  • OpenSpending
  • OpenMedicare
  • OpenLobby
  • TheDataProject.ai

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.

⚠️

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 (Flucelvax Quadrivalent)
  4. Laboratory test
Influenza, Seasonal (Flucelvax Quadrivalent)×Laboratory test

Laboratory test Reports for Influenza, Seasonal (Flucelvax Quadrivalent)

#110 most reported symptom for this vaccine

57
Reports
1
Deaths
9
Hospitalizations
1.75
Mortality Rate
%
15.8
Hosp. Rate
%

Laboratory test and Influenza, Seasonal (Flucelvax Quadrivalent)

Laboratory test has been reported 57 times in association with Influenza, Seasonal (Flucelvax Quadrivalent) vaccination in VAERS. This represents 0.6% of all 8,852 reports for this vaccine.

Among these reports, 1 mentioned death (1.75%) and 9 involved hospitalization (15.8%).

Laboratory test is the #110 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 57 reports of Laboratory test after Influenza, Seasonal (Flucelvax Quadrivalent) vaccination may seem alarming, but context is critical.

The mortality rate of 1.75% warrants monitoring, though VAERS deaths represent temporal associations, not confirmed causal links.

Important Context

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

SARS-CoV-2 test positive59 reportsVaccination failure58 reportsVisual impairment57 reportsUnderdose56 reports

Quick Facts

Reports:57
Deaths:1
Hospitalizations:9
% of Vaccine:0.6%
Rank:#110 of 844

Related Pages

Influenza, Seasonal (Flucelvax Quadrivalent) OverviewLaboratory test (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.