In neighboring eastern New Mexico, the measles case count is up to nine, though state public health officials said Thursday there's still no evidence this outbreak is connected to the one in Texas. The West Texas cases are concentrated in eight counties in West Texas.

An ongoing measles outbreak that began in one of Texas' least vaccinated counties has mushroomed to 90 cases across a cluster of seven counties in the state, according to an update by the Texas Department of State Health Services on Friday.