Across the U.S., there are 1,024 confirmed measles cases as of Friday. Texas still accounts for the vast majority of cases. There are three other major outbreaks in North America.

Since the outbreak began in January in Gaines County, located in West Texas along the state border with New Mexico, 738 cases of measles have been confirmed.

The Texas health department on Friday reported 738 cases of measles in the state, up by nine additional cases since its last update on Tuesday. The U.S. is battling one of the worst outbreaks of measles it has seen,