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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.

⚠️

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

Meningococcal

MEN3,774 total reports
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Manufacturers:

Unknown ManufacturerSanofi PasteurConnaught LaboratoriesConnaught Ltd.

Meningococcal has 3,774 reports in VAERS spanning from 1990 to 2026. Of these reports, 82 mentioned death, 410 involved hospitalization, and 1,294 required emergency department visits. This vaccine is manufactured by: Unknown Manufacturer, Sanofi Pasteur, Connaught Laboratories, Connaught Ltd.. This vaccine accounts for 0.2% of all 1,983,260 reports in the VAERS database.

3,774
Total Reports
82
Deaths
410
Hospitalizations
1,294
ER Visits
99
Disabilities

About Meningococcal

Meningococcal has 3,774 reports in VAERS spanning from 1990 to 2026.

Of these reports, 82 mentioned death, 410 involved hospitalization, and 1,294 required emergency department visits.

This vaccine is manufactured by: Unknown Manufacturer, Sanofi Pasteur, Connaught Laboratories, Connaught Ltd..

This vaccine accounts for 0.2% of all 1,983,260 reports in the VAERS database.

Reporting Rate

This vaccine averages 105 reports per year over 36 years of reporting (1990–2025).

Understanding These Numbers

•Reports don't prove causation. They represent temporal associations where someone experienced an event after vaccination.
•Background rates matter. Many conditions occur naturally and may coincidentally happen after vaccination.
•Reporting varies by vaccine. Newer vaccines or those in the news may have higher reporting rates due to increased awareness.

Most Reported Symptoms

1. Pyrexia(all)
698
2. Headache(all)
602
3. Dizziness(all)
357
4. Pain(all)
340
5. Nausea(all)
336
6. No adverse event(all)
321
7. Injection site erythema(all)
277
8. Injection site pain(all)
267
9. Fatigue(all)
243
10. Vomiting(all)
238

Top Reporting States

1. California276
2. Texas255
3. New York170
4. Pennsylvania161
5. Florida150
6. Michigan114
7. Ohio102
8. Virginia100

Reports by Year

2025131
2024187
2023129
202232
202152
202068
201955
201884
2017151
2016226

Explore Further

⚖️ Compare MEN with OthersRead Analysis Articles

Related Analysis

The Denominator ProblemUnderstanding Reporting BiasWhen Do Side Effects Start?Death Reports Deep DiveSerious Outcomes AnalysisMost Common Symptoms

Data Source

This data comes from the Vaccine Adverse Event Reporting System (VAERS), jointly managed by CDC and FDA.