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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.
Muscle spasms
16,298 total reports8.6% serious outcomes
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16,298
Total Reports
61
Deaths
1,339
Hospitalizations
8.6
Severity Rate
% serious outcomes
About Muscle spasms Reports
Muscle spasms has been reported 16,298 times in VAERS from 1990 to 2026.
Of these reports, 61 were associated with death (0.37%) and 1,339 involved hospitalization.
The overall serious outcome rate (death or hospitalization) for reports mentioning Muscle spasms is 8.6%.
Understanding Muscle spasms in VAERS
•Temporal association only: These reports show Muscle spasms 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 Muscle spasms. 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
1. COVID1913,033
2. FLU31,147
3. VARZOS898
4. TDAP505
5. HPV4486
6. PPV402
7. FLU4400
8. HEP336
9. FLUX321
10. TD291
Detailed Breakdowns
Quick Facts
Reports:16,298
Deaths:61
Hospitalizations:1,339
Mortality Rate:0.37%
Severity Rate:8.6%
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.