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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. Somnolence
Meningococcal B (Trumenba)×Somnolence

Somnolence Reports for Meningococcal B (Trumenba)

#104 most reported symptom for this vaccine

68
Reports
0
Deaths
2
Hospitalizations
0
Mortality Rate
%
2.9
Hosp. Rate
%

Somnolence and Meningococcal B (Trumenba)

Somnolence has been reported 68 times in association with Meningococcal B (Trumenba) vaccination in VAERS. This represents 0.6% of all 11,323 reports for this vaccine.

Among these reports, 0 mentioned death (0.00%) and 2 involved hospitalization (2.9%).

Somnolence is the #104 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 68 reports of Somnolence after Meningococcal B (Trumenba) 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 Somnolence occurred after vaccination, not that the vaccine caused it.
•Background rates: Somnolence 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

Chest discomfort69 reportsDiscomfort69 reportsInjection site urticaria67 reportsLoss of personal independence in daily activities67 reports

Quick Facts

Reports:68
Deaths:0
Hospitalizations:2
% of Vaccine:0.6%
Rank:#104 of 869

Related Pages

Meningococcal B (Trumenba) OverviewSomnolence (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.