At least 124 cases of measles have been reported in Texas since late January — marking the largest outbreak in the state in close to 30 years. The dozens of reported cases have mostly affected children,

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.

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,