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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.

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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. Vaccine Not Specified
  4. Thrombosis
Vaccine Not Specified×Thrombosis

Thrombosis Reports for Vaccine Not Specified

#152 most reported symptom for this vaccine

135
Reports
10
Deaths
42
Hospitalizations
7.41
Mortality Rate
%
31.1
Hosp. Rate
%

Thrombosis and Vaccine Not Specified

Thrombosis has been reported 135 times in association with Vaccine Not Specified vaccination in VAERS. This represents 0.5% of all 29,669 reports for this vaccine.

Among these reports, 10 mentioned death (7.41%) and 42 involved hospitalization (31.1%).

Thrombosis is the #152 most frequently reported symptom for Vaccine Not Specified out of 2482 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 135 reports of Thrombosis after Vaccine Not Specified vaccination may seem alarming, but context is critical.

The 7.41% mortality rate among these reports is elevated, but this reflects the severity of the condition itself rather than vaccine causation.

Important Context

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

Dehydration136 reportsChest X-ray normal135 reportsBlister134 reportsCellulitis133 reports

Quick Facts

Reports:135
Deaths:10
Hospitalizations:42
% of Vaccine:0.5%
Rank:#152 of 2482

Related Pages

Vaccine Not Specified OverviewThrombosis (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.