Measles, a disease once consider eradicated by the United States in 2000, has hit 18 states and is approaching over 400 cases.

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.

A measles outbreak in Kansas doubled in less than a week to 23 cases and has "a possible link” to outbreaks in Texas and New Mexico that have sickened more than 370, the state health department said Wednesday.