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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.
Headache
228,038 total reports5.3% serious outcomes
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228,038
Total Reports
815
Deaths
11,195
Hospitalizations
5.3
Severity Rate
% serious outcomes
About Headache Reports
Headache has been reported 228,038 times in VAERS from 1990 to 2026.
Of these reports, 815 were associated with death (0.36%) and 11,195 involved hospitalization.
The overall serious outcome rate (death or hospitalization) for reports mentioning Headache is 5.3%.
Understanding Headache in VAERS
•Temporal association only: These reports show Headache 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 Headache. 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. COVID19180,760
2. VARZOS17,190
3. FLU39,501
4. TDAP5,500
5. HPV45,447
6. HEP4,927
7. MNQ4,552
8. PPV4,342
9. FLUX3,914
10. FLU43,862
Detailed Breakdowns
Quick Facts
Reports:228,038
Deaths:815
Hospitalizations:11,195
Mortality Rate:0.36%
Severity Rate:5.3%
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.