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 abnormal appears in 7,813 VAERS reports across all vaccines. Of these, 287 reports also mentioned death and 3,211 involved hospitalization. The severity rate (deaths + hospitalizations as a percentage of reports) is 44.8%. The top vaccines associated with this symptom are COVID19, HEP, DTAP. Remember: VAERS reports show temporal association, not causation.
Laboratory test abnormal has been reported 7,813 times in VAERS from 1990 to 2026.
Of these reports, 287 were associated with death (3.67%) and 3,211 involved hospitalization.
The overall serious outcome rate (death or hospitalization) for reports mentioning Laboratory test abnormal is 44.8%.
This data comes from the Vaccine Adverse Event Reporting System (VAERS), jointly managed by CDC and FDA.