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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.
Illness
10,386 total reports8.8% serious outcomes
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10,386
Total Reports
177
Deaths
739
Hospitalizations
8.8
Severity Rate
% serious outcomes
About Illness Reports
Illness has been reported 10,386 times in VAERS from 1990 to 2026.
Of these reports, 177 were associated with death (1.70%) and 739 involved hospitalization.
The overall serious outcome rate (death or hospitalization) for reports mentioning Illness is 8.8%.
Understanding Illness in VAERS
•Temporal association only: These reports show Illness 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 Illness. 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. COVID199,991
2. FLUX860
3. VARZOS621
4. UNK225
5. COVID19-2168
6. FLU440
7. PPV33
8. PNC1331
9. RVX26
10. FLU316
Detailed Breakdowns
Quick Facts
Reports:10,386
Deaths:177
Hospitalizations:739
Mortality Rate:1.70%
Severity Rate:8.8%
Related Analysis
Explore Further
Data Source
This data comes from the Vaccine Adverse Event Reporting System (VAERS), jointly managed by CDC and FDA.