Amid a growing measles outbreak in Texas — which led to the first death from the illness in the U.S. since 2015 — a second, also unvaccinated person has died in New Mexico, which borders the state.

Measles is spreading. It’s a viscous, highly contagious disease — albeit one that can be prevented with vaccines, according to the Centers for Disease control. Some people mistake it for a rash that might dissipate in a few days,

The growing measles outbreak in the U.S. Southwest claimed a second life this week. So far this year, more than 220 cases have been reported across 12 states, with the majority in Texas. John Yang speaks with infectious disease epidemiologist Jessica Malaty Rivera to learn more about the outbreak and how it differs from previous ones in recent years.