The Texas health department on Friday reported 728 cases of measles in the state, up by six cases from its last update on Tuesday. In Gaines County, the epicenter of the outbreak in the state, the number of infections rose by two cases to 408 since the last update,

Three new counties have been added to the outbreak area, which has seen nine more cases over the past week, according to state data released on Friday.

An update from Texas health officials shows the state's measles outbreak has grown by 10 cases over the past week.