Measles was considered eradicated in the United States in 2000. For the first time in 25 years, cases have reached a new high.

The US Centers for Disease Control and Prevention on Wednesday tallied the highest number of US measles cases since the disease was declared eliminated a quarter-century ago, just as a key Senate committee split the vote to advance President Donald Trump’s nominee to lead the public health agency.

Cases are rising in the U.S., but the CDC says most people who bring measles into the U.S. are unvaccinated residents who traveled internationally.

The number of measles cases in the U.S. has reached a 33-year record high, years after it was officially eliminated in the country, prompting public health experts to sound the alarm that other diseases could experience a similar resurgence.

As the U.S. records its worth year for measles spread since 2019, the Illinois Department of Public Health Friday will hold an update on the status of the highly contagious virus with cases across the state.

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.