The Texas health department said on Friday that the number of measles cases in the state rose 20% since its last report three days ago, as experts warn they expect the outbreak to further spread in coming weeks.

Kansas health officials have confirmed 23 measles cases, marking an outbreak for the state as infections in at least 17 states have led to the most cases in the U.S. in a single year since 2019. The Kansas outbreak is spread across 6 southwest counties, the state's Department of Health and Environment said Wednesday.

Measles cases in Texas rose to 400 as the U.S. total reached almost 500 amid the worsening outbreak, officials have said.

Already, the U.S. has more measles cases this year than in all of 2024, the U.S. Centers for Disease Control and Prevention has said. Other states with outbreaks — defined as three or more cases — include New Mexico,

She lived in the outbreak area and had no known underlying health conditions. Her family is part of the Mennonite communi

A measles outbreak in West Texas is continuing to grow in cases as state health officials work to contain the spread of the highly-contagious disease.