There are more than 930 confirmed cases of measles across the U.S. as of Friday, according to the Centers for Disease Control and Prevention, with a majority of the highly contagious illness present in Texas.

Since the measles outbreak began in West Texas, 87 people in Texas have been hospitalized, and two school-aged children have died.

The Texas health department reported 683 cases of measles in the state on Friday, an increase of 20 since April 29, as cases of the childhood disease surpass the 900-mark in one of the worst outbreaks in the country.