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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.

⚠️

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
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  3. Unknown

Unknown

UNK307,638 total reportsRank #1 of 65 jurisdictions
Share
307,638
Total Reports
7,694
Deaths
27,248
Hospitalizations
37,915
ER Visits

About Unknown VAERS Data

Unknown (UNK) has 307,638 adverse event reports in VAERS, representing 15.5% of all reports nationwide.

Of these, 7,694 mentioned death, 27,248 involved hospitalization, and 37,915 required emergency department visits.

Top Vaccines Reported in Unknown

VaccineReportsDeathsHospitalizations
COVID19179,4466,99824,812
VARZOS29,919149447
FLU312,30391662
HPV411,762167411
FLUX10,979246709
VARCEL9,83545234
PPV9,32367547
HEP6,890146320
COVID19-26,286641,630
MMR6,21057251
UNK5,77348467
MNQ4,69725199
RV54,16873360
HEPA4,11331138
FLU43,90641264
TDAP3,24826207
HPV93,1571138
MMRV3,117438
HIBV2,907219376
PNC132,33855290

Understanding State-Level Data

•Population drives volume: More populous states naturally have more reports.
•State of reporter: Reports are attributed to where the reporter lives, which may differ from where vaccination occurred.
•Reporting culture varies: States with more awareness of VAERS or mandated reporting may have higher per-capita rates.

Quick Facts

Reports:307,638
Deaths:7,694
Hospitalizations:27,248
ER Visits:37,915
Share of Total:15.5%
Rank:#1 of 65 jurisdictions

Explore Further

Top Vaccine: COVID19All StatesGeographic AnalysisCompare Vaccines

Related Analysis

Geographic Patterns Analysis →35 Years of Reporting Trends →COVID-19 Impact on VAERS →Serious Outcomes Analysis →Death Reports Deep Dive →

Data Source

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