Cases of the highly contagious disease are expected to rise and potentially spread to other states where vaccination rates are low.

Some private schools have shut down because of a rapidly escalating measles outbreak in West Texas. Local health departments are overstretched, pausing other important work as they race to limit the spread of this highly contagious virus.

Over the past month, the virus has spread in areas with low vaccination rates, and most of those affected are minors.