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.
Menstruation irregular appears in 4,571 VAERS reports across all vaccines. Of these, 8 reports also mentioned death and 85 involved hospitalization. The severity rate (deaths + hospitalizations as a percentage of reports) is 2.0%. The top vaccines associated with this symptom are COVID-19, HPV (Gardasil), HPV (Gardasil 9). Remember: VAERS reports show temporal association, not causation.
Menstruation irregular has been reported 4,571 times in VAERS from 1990 to 2026.
Of these reports, 8 were associated with death (0.18%) and 85 involved hospitalization.
The overall serious outcome rate (death or hospitalization) for reports mentioning Menstruation irregular is 2.0%.
This data comes from the Vaccine Adverse Event Reporting System (VAERS), jointly managed by CDC and FDA.