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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 Quadrivalent)
  4. Hypertension
Influenza, Seasonal (Flublok Quadrivalent)×Hypertension

Hypertension Reports for Influenza, Seasonal (Flublok Quadrivalent)

#139 most reported symptom for this vaccine

11
Reports
2
Deaths
4
Hospitalizations
18.18
Mortality Rate
%
36.4
Hosp. Rate
%

Hypertension and Influenza, Seasonal (Flublok Quadrivalent)

Hypertension has been reported 11 times in association with Influenza, Seasonal (Flublok Quadrivalent) vaccination in VAERS. This represents 0.3% of all 3,407 reports for this vaccine.

Among these reports, 2 mentioned death (18.18%) and 4 involved hospitalization (36.4%).

Hypertension is the #139 most frequently reported symptom for Influenza, Seasonal (Flublok Quadrivalent) out of 377 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 11 reports of Hypertension after Influenza, Seasonal (Flublok Quadrivalent) vaccination may seem alarming, but context is critical.

The 18.18% mortality rate among these reports is elevated, but this reflects the severity of the condition itself rather than vaccine causation.

Important Context

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

Confusional state12 reportsAnaphylactic reaction11 reportsMuscle spasms11 reportsElectrocardiogram11 reports

Quick Facts

Reports:11
Deaths:2
Hospitalizations:4
% of Vaccine:0.3%
Rank:#139 of 377

Related Pages

Influenza, Seasonal (Flublok Quadrivalent) OverviewHypertension (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.