The Texas Department of State Health Services reported Tuesday its measles cases, which date back to late January, had grown to 663 cases as of Tuesday, marking a jump of 17 cases since the state’s last update as 87 of the patients have been hospitalized while two school-aged children have been confirmed dead from the illness.

With one-fifth of states seeing active measles outbreaks, the U.S. is nearing 900 cases, according to figures posted Friday by the U.S. Centers for Disease Control and Prevention. The CDC’s confirmed measles case count is 884,