Texas has reported over 700 measles cases since January, according to the latest numbers from the state’s health department, representing the bulk of measles cases that have been reported in the U.S.

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,

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.