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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. Meningococcal B (Trumenba)
  4. Lethargy
Meningococcal B (Trumenba)×Lethargy

Lethargy Reports for Meningococcal B (Trumenba)

#73 most reported symptom for this vaccine

101
Reports
2
Deaths
6
Hospitalizations
1.98
Mortality Rate
%
5.9
Hosp. Rate
%

Lethargy and Meningococcal B (Trumenba)

Lethargy has been reported 101 times in association with Meningococcal B (Trumenba) vaccination in VAERS. This represents 0.9% of all 11,323 reports for this vaccine.

Among these reports, 2 mentioned death (1.98%) and 6 involved hospitalization (5.9%).

Lethargy is the #73 most frequently reported symptom for Meningococcal B (Trumenba) out of 869 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 101 reports of Lethargy after Meningococcal B (Trumenba) vaccination may seem alarming, but context is critical.

The mortality rate of 1.98% warrants monitoring, though VAERS deaths represent temporal associations, not confirmed causal links.

Important Context

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

Metabolic function test103 reportsOropharyngeal pain102 reportsInjection site mass99 reportsSwelling face97 reports

Quick Facts

Reports:101
Deaths:2
Hospitalizations:6
% of Vaccine:0.9%
Rank:#73 of 869

Related Pages

Meningococcal B (Trumenba) OverviewLethargy (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.