The Centers for Disease Control and Prevention confirmed nearly 900 measles cases in the U.S. on Friday, though much of the measles cases in the country remain centered in Texas, which confirmed earlier this week there have been 624 cases of the highly contagious illness in the state this year.

Texas public health officials on Friday reported an additional 22 measles cases in the ongoing outbreak, for a total of 646 outbreak cases. The state’s Department of State Health Services estimates that one percent of the total cases — or fewer than 10 cases — are actively infectious.