Outbreak defined by the CDC as three or more related cases
By Stephanie Brown HealthDay Reporter
FRIDAY, May 30, 2025 (HealthDay News) — As of today, the total measles case count in the United States is 1,088, according to the U.S. Centers for Disease Control and Prevention.
Texas, which saw the nation’s largest outbreak during the late winter of 2024 and spring of 2025, reported 10 additional cases this week. The case count in Texas now totals 738.
Colorado has reported a total of seven measles cases so far in 2025, including one outbreak of three related cases, as announced by the state health department. These three cases are believed to have originated from an international flight that arrived at Denver International Airport in mid-May and included an unvaccinated child younger than 5 years, an unrelated vaccinated adult, and an out-of-state traveler who was contagious during the flight.
As part of the recent measles outbreak that began in Texas, New Mexico, and Oklahoma, three deaths have been reported: two elementary school-aged children from the West Texas epicenter and an adult in New Mexico, all of whom were unvaccinated.
The CDC defines an outbreak as at least three related cases. Currently, the following states have reported measles outbreaks: Colorado, Kansas, Michigan, Montana, New Mexico, North Dakota, Ohio, Oklahoma, Pennsylvania, Tennessee, and Texas.
Measles cases also have been reported in Alaska, Arkansas, California, Florida, Georgia, Hawaii, Illinois, Indiana, Iowa, Kentucky, Louisiana, Maryland, Minnesota, Missouri, Nebraska, New Jersey, New York, Rhode Island, Vermont, Virginia, and Washington.
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