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,

The number of people with measles in Texas increased to 146. And Eastern New Mexico is also dealing with 9 cases. The MMR vaccine is highly effective and kids who get it will receive two doses. But what about adults?

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.