The University of Texas and Austin Public Health created a measles simulator for school districts and private schools around the county to better understand their risks.

U.S. measles cases hit 1,277—the worst outbreak since the disease was declared eliminated in 2000, surpassing 2019's peak.

While measles symptoms typically resolve in a few weeks, the virus can cause pneumonia, making it difficult for patients, especially children, to get oxygen into their lungs. It may also lead to brain swelling, which can cause lasting damage, including blindness, deafness and intellectual disabilities.

The Centers for Disease Control and Prevention says the U.S. is currently experiencing its worst measles outbreak in more than 30 years, according to the Associated Press. On Wednesday, the CDC said the 2025 case count has surpassed the 2019 count, when there were 1,274 cases for the year.

With nearly six months left in the year, the total number of cases so far in 2025 has surpassed every year since 1992

The Illinois Department of Public Health has reported 10 measles cases in the state so far this year. There were 67 cases last year.