A measles outbreak in Texas has grown to 159 cases, and the US Centers for Disease Control and Prevention says it is now on the ground in that state to respond. The agency posted on X that it’s partnering with the Texas Department of State Health Services.

The United States is facing one of its most significant measles outbreaks in recent decades, with Texas emerging as the focal point of the crisis. Health authorities have confirmed that the state has recorded 159 cases since late January,

The federal health agency said it will be offering onsite support to local officials during the growing outbreak, which has already killed one child.