What You Need to Know
Nationally, there are 712 confirmed cases across 25 US jurisdictions as of April 10.
Texas leads with 561 cases, followed by New Mexico (63) and Kansas (32).
Eleven percent of all cases (79 people) have been hospitalized.
Pennsylvania Added to the List of States With Measles Outbreaks
The Centers for Disease Control and Prevention (CDC) says there are now 7 outbreaks.
Image credit: CDC
This week, Pennsylvania has been added to the list of states with a measles outbreak. Two more cases were diagnosed recently in Erie County, Pa which is in the western part of the state. There have been 5 confirmed cases reported in this county since late March. According to health officials, none of the cases required hospitalization.1
Nationally, as of April 10, there are 712 confirmed cases of measles in the US, which are being reported across 25 jurisdictions: Alaska, Arkansas, California, Colorado, Florida, Georgia, Hawaii, Indiana, Kansas, Kentucky, Maryland, Michigan, Minnesota, New Jersey, New Mexico, New York City, New York State, Ohio, Oklahoma, Pennsylvania, Rhode Island, Tennessee, Texas, Vermont, and Washington.2 According to CDC, 93% of the confirmed cases (660 of 712) are outbreak-associated. For comparison, 16 outbreaks were reported during 2024 and 69% of cases (198 of 285) were outbreak-associated. 2
CDC reports that 11% of cases (79 of 712) have been hospitalized. The federal agency segmented the hospitalizations by age:
- Under 5 years: 20% (45 of 225)
- 5-19 years: 7% (20 of 274)
- 20+ years: 6% (12 of 198)
- Age unknown: 13% (2 of 15)2
CDC reports there have been 7 outbreaks.2 States with the highest recorded counts include Texas (561 cases as of 4/15),3 New Mexico (63 cases as of 4/15),4 Kansas (32 cases as of 4/9),5 Oklahoma (12 cases as of 4/15),6 and Ohio (10 cases as of 3/26).7
Texas health officials say there was an increase of 20 cases in just a few days, since their April 11 update.3 Fewer than 25 of the confirmed cases, are estimated to be actively infectious since their rash onset date was less than a week ago. Patients are infectious 4 days prior to and 4 days after rash onset. Officials say 58 patients have been hospitalized and there have been 2 deaths of school-aged children—who were not vaccinated. 3
The 2025 outbreaks have seen more cases overall compared to last year. In 2024, there were a total of 285 measles cases that were reported by 33 jurisdictions: Arizona, California, District of Columbia, Florida, Georgia, Idaho, Illinois, Indiana, Louisiana, Maryland, Massachusetts, Michigan, Minnesota, Missouri, New Hampshire, New Jersey, New Mexico, New York City, New York State, North Carolina, Ohio, Oklahoma, Oregon, Pennsylvania, South Carolina, South Dakota, Tennessee, Texas, Vermont, Virginia, Washington, Wisconsin, and West Virginia.2
There were 16 outbreaks (defined as 3 or more related cases) reported in 2024, and 69% of cases (198 of 285) are outbreak-associated. For comparison, 4 outbreaks were reported during 2023 and 49% of cases (29 of 59) were outbreak-associated. 2
References
1. Bruce D. Erie County declares measles outbreak with two new cases. What it means. Erie Times. April 14, 2025. Accessed April 16, 2025.
https://www.goerie.com/story/news/healthcare/2025/04/14/erie-county-measles-outbreak-two-more-cases-confirmed/83079749007/
2. Measles Cases and Outbreaks. CDC. April 11, 2025. Accessed April 16, 2025.
https://www.cdc.gov/measles/data-research/index.html
3. Measles Outbreak – April 15, 2025. Texas Department of State Health Services press release. April 15, 2025. Accessed April 16, 2025.
https://www.dshs.texas.gov/news-alerts/measles-outbreak-2025
4. 2025 Measles Outbreak Guidance. NMDOH. April 15, 2025. Accessed April 16, 2025.
https://www.nmhealth.org/news/alert/2025/2/?view=2177
5. Measles data. Kansas Department of Health and Environment. April 9, 2025. Accessed April 16, 2025.https://www.kdhe.ks.gov/2314/Measles-Data
6. Measles. Oklahoma State Department of Health. April 15, 2025. Accessed April 16, 2025
7. Health Director Urges Parents to Ensure Children Are Vaccinated Against Measles as ODH Confirms Outbreak in Ohio. March 26, 2025. Accessed April 16, 2025.
https://odh.ohio.gov/media-center/odh-news-releases/odh-confirms-measles-outbreak-032625
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