Western Texas has become a breeding ground for cases of measles. Nearly all cases are suspected to be in unvaccinated individuals.

As measles cases in West Texas are still on the rise two months after the outbreak began, local public health officials say they expect the virus to keep spreading for at least several more months and that the official case number is likely an undercount.

The measles outbreak that began in the South Plain regions of Texas has swelled to more than 370 cases in three states.