Three North Texas counties have confirmed new cases of measles and on Tuesday, we're expecting to get another update on the West Texas outbreak.

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.

The Texas measles outbreak that began in Gaines County has grown to 683 cases, officials said on Friday. Ten of the impacted counties in Texas have “ongoing measles transmission,” although the state public health department estimates there are currently fewer than 10 confirmed cases still infectious.