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.
Injection site hypersensitivity appears in 19,913 VAERS reports across all vaccines. Of these, 9 reports also mentioned death and 403 involved hospitalization. The severity rate (deaths + hospitalizations as a percentage of reports) is 2.1%. The top vaccines associated with this symptom are Polio (OPV), MMR, Td. Remember: VAERS reports show temporal association, not causation.
Injection site hypersensitivity has been reported 19,913 times in VAERS from 1990 to 2026.
Of these reports, 9 were associated with death (0.05%) and 403 involved hospitalization.
The overall serious outcome rate (death or hospitalization) for reports mentioning Injection site hypersensitivity is 2.1%.
This data comes from the Vaccine Adverse Event Reporting System (VAERS), jointly managed by CDC and FDA.