CHICAGO, IL-Reuters reports the Pan American Health Organization on Friday “reported…an increase in measles cases in the Americas, particularly North America, amid rising deaths from the infection in Mexico, the United States and Canada.” PAHO figures show that as of August 8, “10,139 cases of measles and 18 related deaths had been confirmed from among 10 countries in the Americas, representing a 34-fold increase compared to the same period in 2024.” Of those 18 deaths, “14 were in Mexico, three in the United States and one in Canada.” The UN agency attributed the outbreaks to low vaccination coverage, “as 71% of cases occurred in unvaccinated people and 18% in individuals with unknown vaccination status.”
As of August 5, 2025, a total of 1,356 confirmed* measles cases were reported by 41 jurisdictions: Alaska, Arkansas, Arizona, California, Colorado, Florida, Georgia, Hawaii, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maryland, Michigan, Minnesota, Missouri, Montana, Nebraska, New Jersey, New Mexico, New York City, New York State, North Carolina, North Dakota, Ohio, Oklahoma, Oregon, Pennsylvania, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, Utah, Vermont, Virginia, Washington, Wisconsin, and Wyoming.
There have been 32 outbreaks** reported in 2025, and 87% of confirmed cases (1,177 of 1,356) are outbreak-associated. For comparison, 16 outbreaks were reported during 2024 and 69% of cases (198 of 285) were outbreak-associated.
*CDC is aware of probable measles cases being reported by jurisdictions. However, the data on this page only includes confirmed cases.
**CDC reports the cumulative number of measles outbreaks (defined as 3 or more related cases) that have occurred this year in the U.S.; states have the most up-to-date information about cases and outbreaks in their jurisdictions.
As of this article’s deadline, the Centers for Disease Control and Prevention (CDC) has reported 164 measles cases in nine states. That is more than the number of measles cases reported in all of 2023. Meanwhile, there were 285 measles cases reported in 33 states in 2024.
U.S. Cases in 2025
Total cases
1356
Age
Under 5 years: 386 (28%)
5-19 years: 501 (37%)
20+ years: 462 (34%)
Age unknown: 7 (1%)
Vaccination Status
Unvaccinated or Unknown: 92%
One MMR dose: 4%
Two MMR doses: 4%
U.S. Hospitalizations in 2025
13%
13% of cases hospitalized (171 of 1356).
Percent of Age Group Hospitalized
Under 5 years: 21% (82 of 386)
5-19 years: 8% (40 of 501)
20+ years: 11% (49 of 462)
Age unknown: 0% (0 of 7)
U.S. Deaths in 2025
3
There have been 3 confirmed deaths from measles.
Media Release/AMA Morning Rounds
