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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.
Laboratory test
18,522 total reports37.2% serious outcomes
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18,522
Total Reports
557
Deaths
6,331
Hospitalizations
37.2
Severity Rate
% serious outcomes
About Laboratory test Reports
Laboratory test has been reported 18,522 times in VAERS from 1990 to 2026.
Of these reports, 557 were associated with death (3.01%) and 6,331 involved hospitalization.
The overall serious outcome rate (death or hospitalization) for reports mentioning Laboratory test is 37.2%.
Understanding Laboratory test in VAERS
•Temporal association only: These reports show Laboratory test 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 Laboratory test. 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. COVID1916,896
2. HPV41,018
3. FLU3993
4. VARZOS966
5. FLU4577
6. TDAP513
7. COVID19-2496
8. PPV465
9. PNC13426
10. MMR397
Detailed Breakdowns
Quick Facts
Reports:18,522
Deaths:557
Hospitalizations:6,331
Mortality Rate:3.01%
Severity Rate:37.2%
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.