A child in West Texas has died of measles, state health officials said on Wednesday, the first reported U.S. death from the highly contagious disease in a decade, as a Texas outbreak has grown from a handful of cases to more than 130 across two states.

Gaines County in West Texas is at the heart of the ongoing measles outbreak. Non-medical vaccine exemption rates there are high.

People who are vaccinated, or who have had the measles before, are unlikely to catch the virus ― even if they come into contact with someone who’s sick. The measles vaccine, t