A meeting is set to take place this week that will determine whether the United States has lost its measles elimination status.

An independent group of experts in epidemiology, public health, virology, pediatrics, and immunization, appointed by the Pan American Health Organization (PAHO), will review evidence to determine whether the U.S. has seen a year of continuous transmission.

The threat of the U.S. losing its elimination status looms, especially after Canada lost its measles elimination status last year after struggling to contain a year-long measles outbreak.