Texas health officials say the number of people with measles has increased to 146 in rural West Texas outbreak that led this week to the death of a school-aged child who was not vaccinated.

An outbreak of measles in northwest Texas grew to 146 cases on Friday, two days after health officials reported that a child had died after being hospitalized in Lubbock. Twenty people have been hospitalized for treatment amid the outbreak,

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.