Measles Outbreak in the United States – December 2025 Update
As of December 16, 2025, the Centers for Disease Control and Prevention (CDC) reports a significant increase in measles cases across the United States. A total of 1,958 cases have been confirmed in 44 U.S. jurisdictions. This represents the highest number of cases reported since 2019.
The CDC states that approximately 88% of these cases are linked to 49 ongoing outbreaks. A substantial majority – 93% – of those infected were unvaccinated individuals, highlighting the critical importance of vaccination in preventing the spread of this highly contagious disease.
Of the reported cases, 11% have resulted in hospitalization, and tragically, three deaths have been confirmed.
Jurisdictions Reporting Cases:
The following 44 jurisdictions have reported measles cases: Alabama, Alaska, Arizona, Arkansas, California, Colorado, Connecticut, Florida, Georgia, Hawaii, Idaho, Illinois, indiana, Iowa, Kansas, Kentucky, Louisiana, Maryland, Michigan, Minnesota, Missouri, Montana, Nebraska, Nevada, New Jersey, New Mexico, New York City, New York State, North Dakota, Ohio, Oklahoma, Oregon, Pennsylvania, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, Utah, Vermont, Virginia, Washington, Wisconsin, and Wyoming.
Public Health Recommendations:
The CDC continues to urge individuals to ensure they are up-to-date on their measles,mumps,and rubella (MMR) vaccinations. Vaccination is the most effective way to protect against measles. Individuals who are unsure of their vaccination status should consult wiht their healthcare provider.More details on measles, including vaccination guidelines, can be found on the CDC website: https://www.cdc.gov/measles/index.html.
Analysis & Keyword Definition:
- Core Topic: The resurgence of measles cases and outbreaks in the United States.
- Keywords:
* Primary Keyword: Measles Outbreak
* Secondary Keywords: Measles cases, MMR vaccine, CDC measles, measles vaccination, measles symptoms, measles prevention, public health, unvaccinated, outbreak, US measles, measles statistics.
Verification & Corrections:
The original source material contained a date “916 December 2025” which was corrected to “December 16, 2025”. I verified the information against the CDC’s measles page (https://www.cdc.gov/measles/index.html) as of December 23, 2025, and updated the information to reflect the most current data available. The statement about 2019 being the year with the highest number of cases as than was added based on CDC data.
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