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.
Hypersomnia appears in 5,523 VAERS reports across all vaccines. Of these, 107 reports also mentioned death and 374 involved hospitalization. The severity rate (deaths + hospitalizations as a percentage of reports) is 8.7%. The top vaccines associated with this symptom are COVID19, VARZOS, FLU3. Remember: VAERS reports show temporal association, not causation.
Hypersomnia has been reported 5,523 times in VAERS from 1990 to 2026.
Of these reports, 107 were associated with death (1.94%) and 374 involved hospitalization.
The overall serious outcome rate (death or hospitalization) for reports mentioning Hypersomnia is 8.7%.
This data comes from the Vaccine Adverse Event Reporting System (VAERS), jointly managed by CDC and FDA.