The Navajo Nation is now under a public health state of emergency due to the growing spread of the coronavirus outbreak.
Navajo Nation President Jonathan Nez's office announced the declaration Wednesday in a statement.
It said that there were no confirmed cases on the tribe's sprawling reservation that includes parts of Arizona, New Mexico and Utah.
But Nez said the declaration is a “proactive measure to help ensure the Navajo Nation’s preparedness and the health and well-being of the Navajo people."
Nez also imposed travel restrictions for all executive-branch employees.
For most people, the new coronavirus causes only mild or moderate symptoms. But for some, it can cause more severe illness.