WATCH: CDC classifies outbreak as ‘Level 3’ emergency

The U.S. Centers for Disease Control and Prevention activated its Emergency Operations Center and classified the hantavirus outbreak as a Level 3 emergency, multiple sources told ABC News.

The U.S. Centers for Disease Control and Prevention activated its Emergency Operations Center and classified the hantavirus outbreak as a Level 3 emergency, multiple sources told ABC News.

The U.S. Centers for Disease Control and Prevention activated its Emergency Operations Center and classified the hantavirus outbreak as a Level 3 emergency, multiple sources told ABC News.