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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. Varicella (Varivax)

Varicella (Varivax)

VARCEL93,126 total reports
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Manufacturers:

Merck & Co.Unknown ManufacturerGlaxoSmithKline

Varicella (Varivax) has 93,126 reports in VAERS spanning from 1990 to 2026. Of these reports, 308 mentioned death, 3,357 involved hospitalization, and 30,005 required emergency department visits. This vaccine is manufactured by: Merck & Co., Unknown Manufacturer, GlaxoSmithKline. This vaccine accounts for 4.7% of all 1,983,260 reports in the VAERS database.

93,126
Total Reports
308
Deaths
3,357
Hospitalizations
30,005
ER Visits
885
Disabilities

About Varicella (Varivax)

Varicella (Varivax) has 93,126 reports in VAERS spanning from 1990 to 2026.

Of these reports, 308 mentioned death, 3,357 involved hospitalization, and 30,005 required emergency department visits.

This vaccine is manufactured by: Merck & Co., Unknown Manufacturer, GlaxoSmithKline.

This vaccine accounts for 4.7% of all 1,983,260 reports in the VAERS database.

Reporting Rate

This vaccine averages 2,910 reports per year over 32 years of reporting (1995–2026).

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. No adverse event(all)
14,907
2. Pyrexia(all)
13,162
3. Injection site erythema(all)
11,724
4. Rash(all)
9,781
5. Infection(all)
7,683
6. Drug ineffective(all)
7,528
7. Injection site swelling(all)
7,455
8. Erythema(all)
6,491
9. Product storage error(all)
5,594
10. Dermatitis bullous(all)
5,234

Top Reporting States

1. California7,450
2. Texas5,722
3. Pennsylvania4,592
4. New York4,206
5. Michigan4,044
6. Ohio3,569
7. Florida3,494
8. Georgia2,942

Reports by Year

202615
20251,318
20241,657
20231,804
20221,791
20211,765
20201,740
20192,388
20182,729
20173,761

Explore Further

⚖️ Compare VARCEL with OthersRead Analysis Articles

Related Analysis

📋 Side Effects Guide →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.