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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.
Hypertonia
2,618 total reports18.0% serious outcomes
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2,618
Total Reports
32
Deaths
438
Hospitalizations
18
Severity Rate
% serious outcomes
About Hypertonia Reports
Hypertonia has been reported 2,618 times in VAERS from 1990 to 2026.
Of these reports, 32 were associated with death (1.22%) and 438 involved hospitalization.
The overall serious outcome rate (death or hospitalization) for reports mentioning Hypertonia is 18.0%.
Understanding Hypertonia in VAERS
•Temporal association only: These reports show Hypertonia 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 Hypertonia. 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.
Quick Facts
Reports:2,618
Deaths:32
Hospitalizations:438
Mortality Rate:1.22%
Severity Rate:18.0%
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.