Measles cases linked to a West Texas outbreak have now been confirmed in two North Texas counties, marking the virus's continued spread across the state. State health officials said cases have been identified in Collin and Rockwall counties,

Specifically, a measles case reported in Collin County and a measles case reported in Rockwall County are included in the numbers linked to the West Texas outbreak, according to a

State health officials on Tuesday said the number of measles cases in the state linked to a West Texas outbreak has grown to 717 since January.