Amid the outbreak of measles in West Texas, there’s a question of how contagious the disease is — and whether it will spread.

Vaccination eliminated measles from the U.S. 25 years ago. But it can still spread in pockets where vaccination rates are low, like the west Texas county with a current outbreak. Here's how fast.

Despite an unvaccinated child’s death, local residents in West Texas say personal choice—not public-health policy—should guide their decisions.