A Texas measles outbreak has doubled in the last week to 124 cases, state health officials said Tuesday, a day after they warned a person infected with the highly contagious disease had traveled from the outbreak zone.

Texas faces its worst measles outbreak in over 30 years, with the first US measles death since 2015, prompting calls for action from Democratic leaders.

A child hospitalized with measles in West Texas has died. It's the first death in an outbreak that began last month.