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.
263 adverse event reports (+217% vs 2009)
In 2010, 263 adverse event reports were filed for Measles, Mumps, Rubella & Varicella (Proquad) in VAERS. This represents 1.1% of all 23,562 reports for this vaccine.
Of these reports, 0 mentioned death, 10 involved hospitalization, 106 required ER visits, and 7 reported disability.
Compared to the average of 1,145 reports per year for this vaccine, 2010 was below average (-77%).
Year-over-year change: The large change from 2009 likely reflects a ramp-up in vaccination (e.g., new vaccine rollout or expanded eligibility) rather than a change in per-dose risk.
This data comes from the Vaccine Adverse Event Reporting System (VAERS), jointly managed by CDC and FDA.