Potential tuberculosis exposure at an Irving ISD high school has Dallas County Health & Human Services recommending all returning students get tested.

MacArthur High School tuberculosis exposure What we know: Dallas County Health & Human Services says it is investigating possible tuberculosis exposure at MacArthur High School in Irving ISD from the 2025-26 school year.

Irving ISD is recommending any returning student in 10th, 11th or 12th grade get tested for tuberculosis if they have not already been tested.