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.
Differential white blood cell count appears in 2,524 VAERS reports across all vaccines. Of these, 44 reports also mentioned death and 756 involved hospitalization. The severity rate (deaths + hospitalizations as a percentage of reports) is 31.7%. The top vaccines associated with this symptom are COVID19, PNC13, FLU3. Remember: VAERS reports show temporal association, not causation.
Differential white blood cell count has been reported 2,524 times in VAERS from 1990 to 2026.
Of these reports, 44 were associated with death (1.74%) and 756 involved hospitalization.
The overall serious outcome rate (death or hospitalization) for reports mentioning Differential white blood cell count is 31.7%.
This data comes from the Vaccine Adverse Event Reporting System (VAERS), jointly managed by CDC and FDA.