The Texas health department reported 624 cases of measles in the state on Tuesday, an increase of 27 from April 18.

The number of cases reported in Texas’ historic measles outbreak has risen to 597, an increase of 36 cases since Friday, according to state officials on Friday. Of those, 62

Texas reported 27 new confirmed measles cases on Tuesday, a 4% increase from its previous update as the virus’s spread slows.

The Texas Department of State Health Services on Friday, reported 597 measles cases in the state since late January, an increase of 36 since the update on Tuesday. The department said the outbreak is primarily in West Texas and added that 4% or fewer than 30 of the confirmed cases are estimated to be actively infectious since their rash onset date was less than a week ago.

Dr. Jennifer Moriera with Baylor Scott & White gives insight into the latest in the measles outbreak as the virus continues to spread.