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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 (Fluvirin)
  4. Memory impairment
Influenza, Seasonal (Fluvirin)×Memory impairment

Memory impairment Reports for Influenza, Seasonal (Fluvirin)

#411 most reported symptom for this vaccine

114
Reports
6
Deaths
41
Hospitalizations
5.26
Mortality Rate
%
36
Hosp. Rate
%

Memory impairment and Influenza, Seasonal (Fluvirin)

Memory impairment has been reported 114 times in association with Influenza, Seasonal (Fluvirin) vaccination in VAERS. This represents 0.1% of all 119,695 reports for this vaccine.

Among these reports, 6 mentioned death (5.26%) and 41 involved hospitalization (36.0%).

Memory impairment is the #411 most frequently reported symptom for Influenza, Seasonal (Fluvirin) out of 3021 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 114 reports of Memory impairment after Influenza, Seasonal (Fluvirin) vaccination may seem alarming, but context is critical. With 119,695 total reports for this vaccine (representing many millions of doses), Memory impairment appears in only 0.1% of reports.

The 5.26% 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 Memory impairment occurred after vaccination, not that the vaccine caused it.
•Background rates: Memory impairment 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

Otitis media114 reportsThirst114 reportsAdverse reaction114 reportsRespiratory rate increased113 reports

Quick Facts

Reports:114
Deaths:6
Hospitalizations:41
% of Vaccine:0.1%
Rank:#411 of 3021

Related Pages

Influenza, Seasonal (Fluvirin) OverviewMemory impairment (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.