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The nation had 2,289 cases in 2025, the worst year for measles in more than three decades.
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The U.S. has surpassed 2025’s record for measles cases, with five months left in 2026. The U.S. Centers for Disease Control and Prevention said Friday it has logged more than 2,300 cases of measles as of Thursday. Major outbreaks in South Carolina, Utah, and Arizona have contributed to the rise. Experts say the actual spread might be greater due to underreporting and declining vaccination rates. For example, experts relying on mathematical modeling and genetic analyses believe a large outbreak on the Utah-Arizona border could be around three to four times bigger than the official count.
FILE - Health department staff members enter the Andrews County Health Department measles clinic carrying doses of the measles, mumps and rubella vaccine, April 8, 2025, in Andrews, Texas. (AP Photo/Annie Rice, File)
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The county adds that no public exposures were reported for these cases, who had been asked to quarantine.
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The first measles case since 2018 has been reported in Washoe County. Northern Nevada Public Health says a man tested positive on Friday.
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The Southern Nevada Health District has reported a confirmed case of measles in an out-of-state visitor to Clark County.
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The Southern Nevada Health District has confirmed a measles case in a traveler at Harry Reid International Airport.
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The Washoe County School District and Northern Nevada Public Health are holding several after-school immunization clinics.
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The measles outbreak in rural West Texas has grown to 124 cases across nine counties. There are also nine cases in eastern New Mexico.
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Childhood vaccination rates against dangerous infections like measles and polio continue to fall nationwide.