With nearly 800 cases and rising concern across the Southwest, experts warn the U.S. could lose measles eradication status without higher immunization rates.

The area of Short Creek, which bridges the Arizona-Utah border, has seen nearly 160 measles cases and counting.

A measles outbreak on the Arizona-Utah border is the second largest in the United States in 2025, which has been a record-setting year for measles.

A traveler with measles passed through the New Orleans airport Sunday night, a brief encounter that health officials say poses a low risk for most people. But for those without immunity, such as children too young to be vaccinated or people with health conditions that prevent vaccination, the risk is higher.

Travelers to, from, and within Australia and New Zealand need to be informed and take precautions as the global measles outbreak continues to spread.