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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 (Flulaval Quadrivalent)
  4. Middle insomnia
Influenza, Seasonal (Flulaval Quadrivalent)×Middle insomnia

Middle insomnia Reports for Influenza, Seasonal (Flulaval Quadrivalent)

#328 most reported symptom for this vaccine

68
Reports
0
Deaths
4
Hospitalizations
0
Mortality Rate
%
5.9
Hosp. Rate
%

Middle insomnia and Influenza, Seasonal (Flulaval Quadrivalent)

Middle insomnia has been reported 68 times in association with Influenza, Seasonal (Flulaval Quadrivalent) vaccination in VAERS. This represents 0.1% of all 52,111 reports for this vaccine.

Among these reports, 0 mentioned death (0.00%) and 4 involved hospitalization (5.9%).

Middle insomnia is the #328 most frequently reported symptom for Influenza, Seasonal (Flulaval Quadrivalent) out of 2354 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 68 reports of Middle insomnia after Influenza, Seasonal (Flulaval 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 Middle insomnia occurred after vaccination, not that the vaccine caused it.
•Background rates: Middle insomnia 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

X-ray limb abnormal69 reportsProduct preparation error69 reportsBlood culture negative67 reportsResuscitation67 reports

Quick Facts

Reports:68
Deaths:0
Hospitalizations:4
% of Vaccine:0.1%
Rank:#328 of 2354

Related Pages

Influenza, Seasonal (Flulaval Quadrivalent) OverviewMiddle insomnia (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.