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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 (MMR II)2023

Measles, Mumps & Rubella (MMR II) in 2023

1,362 adverse event reports (-2% vs 2022)

1,362

Reports

Deaths

Hospitalizations

ER Visits

Disabilities

← 2022 (1,385 reports)2024 (1,571 reports) →

2023 Reporting Summary

In 2023, 1,362 adverse event reports were filed for Measles, Mumps & Rubella (MMR II) in VAERS. This represents 1.5% of all 89,976 reports for this vaccine.

Of these reports, 3 mentioned death, 35 involved hospitalization, 90 required ER visits, and 13 reported disability.

Compared to the average of 2,391 reports per year for this vaccine, 2023 was below average (-43%).

💡 What This Means

In 2023, reporting for Measles, Mumps & Rubella (MMR II) was within typical ranges. As always, VAERS data reflects reports filed, not confirmed adverse events. Trends should be interpreted alongside vaccination volume and population health data.

All Years for Measles, Mumps & Rubella (MMR II)

Year	Reports	Deaths	Hosp.
2025	1,629	3	60
2024	1,571	12	40
2023 ← current	1,362	3	35
2022	1,385	2	30
2021	1,431	5	46
2020	1,205	5	55
2019	2,526	8	93
2018	1,787	3	57
2017	2,514	2	80
2016	2,744	7	81
2015	3,162	15	85
2014	2,502	2	83
2013	2,231	3	74
2012	2,353	12	113
2011	2,513	11	138
2010	3,148	5	144
2009	3,145	30	159
2008	3,248	11	134
2007	2,275	8	105
2006	3,479	15	161
2005	3,785	10	159
2004	4,178	7	165
2003	4,158	10	166
2002	3,604	9	161
2001	3,083	16	189
2000	2,470	10	155
1999	2,167	18	163
1998	1,926	9	151
1997	2,064	12	176
1996	2,004	12	182
1995	2,066	11	219
1994	2,053	11	218
1993	1,803	13	188
1992	2,134	17	211
1991	2,143	10	226
1990	228	5	44

Understanding Yearly Data

•Spikes may reflect awareness: Years with unusual activity (e.g., pandemic) often see increased reporting.

•Dose volume matters: More vaccinations given in a year naturally leads to more reports.

•Reporting lag: Some events are reported months after they occur, so recent years may be incomplete.

Quick Facts

Reports:1,362

Deaths:3

Hospitalizations:35

% of Total:1.5%

Rank (by vol.):#34 of 36 years

Avg/year:2,391

Measles, Mumps & Rubella (MMR II) Overview ← 2022 Reports 2024 Reports →35 Years of Reporting Compare Vaccines

Data Source

This data comes from the Vaccine Adverse Event Reporting System (VAERS), jointly managed by CDC and FDA.