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

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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. Vaccine Not Specified
  4. Metabolic encephalopathy
Vaccine Not Specified×Metabolic encephalopathy

Metabolic encephalopathy Reports for Vaccine Not Specified

#634 most reported symptom for this vaccine

22
Reports
2
Deaths
3
Hospitalizations
9.09
Mortality Rate
%
13.6
Hosp. Rate
%

Metabolic encephalopathy and Vaccine Not Specified

Metabolic encephalopathy has been reported 22 times in association with Vaccine Not Specified vaccination in VAERS. This represents 0.1% of all 29,669 reports for this vaccine.

Among these reports, 2 mentioned death (9.09%) and 3 involved hospitalization (13.6%).

Metabolic encephalopathy is the #634 most frequently reported symptom for Vaccine Not Specified out of 2482 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 22 reports of Metabolic encephalopathy after Vaccine Not Specified vaccination may seem alarming, but context is critical.

The 9.09% 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 Metabolic encephalopathy occurred after vaccination, not that the vaccine caused it.
•Background rates: Metabolic encephalopathy 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

Hidradenitis22 reportsHyperglycaemia22 reportsLumbar spinal stenosis22 reportsRhinitis21 reports

Quick Facts

Reports:22
Deaths:2
Hospitalizations:3
% of Vaccine:0.1%
Rank:#634 of 2482

Related Pages

Vaccine Not Specified OverviewMetabolic encephalopathy (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.