Texas added just 10 new cases this week, but there must be no new cases over a 42-day period before an outbreak is declared over.

The Texas health department on Friday reported 728 cases of measles in the state, up by six cases since 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,

The measles outbreak centered in northwest Texas grew to 728 cases on Friday, a net gain of 10 new infections over the past week, according to the latest update from the Texas Department of State Health Services.