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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 (Flublok)
  4. Injection site haemorrhage
Influenza, Seasonal (Flublok)×Injection site haemorrhage

Injection site haemorrhage Reports for Influenza, Seasonal (Flublok)

#96 most reported symptom for this vaccine

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

Injection site haemorrhage and Influenza, Seasonal (Flublok)

Injection site haemorrhage has been reported 3 times in association with Influenza, Seasonal (Flublok) vaccination in VAERS. This represents 1.0% of all 314 reports for this vaccine.

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

Injection site haemorrhage is the #96 most frequently reported symptom for Influenza, Seasonal (Flublok) out of 111 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 3 reports of Injection site haemorrhage after Influenza, Seasonal (Flublok) 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 haemorrhage occurred after vaccination, not that the vaccine caused it.
•Background rates: Injection site haemorrhage 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 pain3 reportsCellulitis3 reportsInjected limb mobility decreased3 reportsInfluenza3 reports

Quick Facts

Reports:3
Deaths:0
Hospitalizations:0
% of Vaccine:1.0%
Rank:#96 of 111

Related Pages

Influenza, Seasonal (Flublok) OverviewInjection site haemorrhage (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.