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.

The surge in measles cases in Texas began in late January when two cases were reported in Gaines County, as reported by The Houston Chronicle. Since then, the number of cases in Gaines County reached 80,

The measles outbreak that began in West Texas is still growing, with exposures on university campuses and other places in San Antonio and San Marcos.