The number of measles cases in the United States has surpassed 2019's wave of infections, according to Centers for Disease Control and Prevention data.

Not a single case of measles has been detected in Southern Nevada this year, despite infections across the country reaching their highest level in more than three decades, the head of the Southern Nevada Health District said on Thursday.

Confirmed measles cases in the U.S. reached a total of 1,288, according to data from the Centers for Disease Control and Prevention on Wednesday, rising above 2019 levels as the country battles one of its worst outbreaks of the childhood disease.

CDC data shows 2025 is now the worst year for measles cases in this country in more than three decades. More than 150 people have been hospitalized due to the growing outbreak and three have died, including two unvaccinated children in Texas.

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.

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

The virus was wiped out in the United States quarter a century ago, so why is it killing children again in 2025?