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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.
Thrombosis
6,547 total reports42.5% serious outcomes
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6,547
Total Reports
454
Deaths
2,331
Hospitalizations
42.5
Severity Rate
% serious outcomes
About Thrombosis Reports
Thrombosis has been reported 6,547 times in VAERS from 1990 to 2026.
Of these reports, 454 were associated with death (6.93%) and 2,331 involved hospitalization.
The overall serious outcome rate (death or hospitalization) for reports mentioning Thrombosis is 42.5%.
Understanding Thrombosis in VAERS
•Temporal association only: These reports show Thrombosis occurred after vaccination, not necessarily because of vaccination.
•Background rates matter: Many symptoms occur naturally at baseline rates in the population, unrelated to vaccination.
•Reporting variability: Medical terminology may be used differently by various healthcare providers and over time.
•Investigation needed: High-frequency reports may trigger further epidemiological studies to determine causation.
What This Data Shows
Most Associated Vaccines: The vaccines most frequently mentioned in reports with Thrombosis. This may reflect usage patterns, not causation.
Severity Patterns: The percentage of reports that involve serious outcomes can help prioritize safety investigations.
Reporting Trends: Changes in reporting frequency over time may reflect increased awareness, media attention, or actual safety signals.
Most Associated Vaccines
View all vaccines →Detailed Breakdowns
Quick Facts
Reports:6,547
Deaths:454
Hospitalizations:2,331
Mortality Rate:6.93%
Severity Rate:42.5%
Related Analysis
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Data Source
This data comes from the Vaccine Adverse Event Reporting System (VAERS), jointly managed by CDC and FDA.