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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. COVID-19 Bivalent (Moderna)
  4. Thrombosis
COVID-19 Bivalent (Moderna)×Thrombosis

Thrombosis Reports for COVID-19 Bivalent (Moderna)

#268 most reported symptom for this vaccine

81
Reports
5
Deaths
40
Hospitalizations
6.17
Mortality Rate
%
49.4
Hosp. Rate
%

Thrombosis and COVID-19 Bivalent (Moderna)

Thrombosis has been reported 81 times in association with COVID-19 Bivalent (Moderna) vaccination in VAERS. This represents 0.2% of all 42,946 reports for this vaccine.

Among these reports, 5 mentioned death (6.17%) and 40 involved hospitalization (49.4%).

Thrombosis is the #268 most frequently reported symptom for COVID-19 Bivalent (Moderna) out of 2434 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 81 reports of Thrombosis after COVID-19 Bivalent (Moderna) vaccination may seem alarming, but context is critical.

The 6.17% 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

Magnetic resonance imaging normal82 reportsTroponin81 reportsBlister81 reportsFacial paralysis81 reports

Quick Facts

Reports:81
Deaths:5
Hospitalizations:40
% of Vaccine:0.2%
Rank:#268 of 2434

Related Pages

COVID-19 Bivalent (Moderna) 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.