Texas reported 90 cases this week, while New Mexico reported nine. A majority of the cases have been in a Texas county where vaccination rates have lagged behind the rest of the state.

The measles outbreak in West Texas has grown to 58 cases as of Tuesday. Eight people in neighboring eastern New Mexico also have been diagnosed with the highly contagious disease.

Health officials in two US states are tracking measles outbreaks as cases rise to nearly 100 people. The Texas Department of State Health Services reported Friday that it was aware of 90 cases diagnosed in the last month in the South Plains area,