The ongoing Texas measles outbreak has rapidly grown to the largest the state has seen in decades, spreading through mostly unvaccinated residents and creeping across both county and state lines. On Friday morning,

The U.S. Centers for Disease Control and Prevention on Friday reported that measles cases so far this year had jumped to 93 from 14 a week ago, mainly driven by an outbreak in Texas. The Texas Department of State Health Services said last week that more cases of the highly contagious disease were likely to surface due to an outbreak in Gaines County.

Only five of the infected individuals were vaccinated, with the rest either unvaccinated or having unknown vaccination status.