Sign up for The Brief, The Texas Tribune’s daily newsletter that keeps readers up to speed on the most essential Texas news. The number of cases reported in Texas' historic measles outbreak has risen to 683 cases in 29 counties,

More than 700 cases of measles have been confirmed in an outbreak across Texas, state health officials reported Tuesday, as other outbreaks of the highly contagious illness spread across dozens of other states.

The measles outbreak has grown to nearly 800 cases across three states, but none of the Dallas-Fort Worth area cases have been linked to the outbreak.