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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.
Measles, Mumps, Rubella & Varicella (Proquad)
MMRV23,562 total reports
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Manufacturers:
23,562
Total Reports
45
Deaths
511
Hospitalizations
3,684
ER Visits
189
Disabilities
About Measles, Mumps, Rubella & Varicella (Proquad)
Measles, Mumps, Rubella & Varicella (Proquad) has 23,562 reports in VAERS spanning from 1990 to 2026.
Of these reports, 45 mentioned death, 511 involved hospitalization, and 3,684 required emergency department visits.
This vaccine is manufactured by: Merck & Co., Unknown Manufacturer.
This vaccine accounts for 1.2% of all 1,983,260 reports in the VAERS database.
Reporting Rate
This vaccine averages 1,071 reports per year over 22 years of reporting (2005–2026).
Understanding These Numbers
•Reports don't prove causation. They represent temporal associations where someone experienced an event after vaccination.
•Background rates matter. Many conditions occur naturally and may coincidentally happen after vaccination.
•Reporting varies by vaccine. Newer vaccines or those in the news may have higher reporting rates due to increased awareness.
Most Reported Symptoms
2,335
1,276
Top Reporting States
Reports by Year
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Related Analysis
Data Source
This data comes from the Vaccine Adverse Event Reporting System (VAERS), jointly managed by CDC and FDA.