WINDOW ROCK, Ariz. – The Navajo Nation reported six more COVID-19 cases, but no additional deaths.

The tribe has seen 33,240 confirmed COVID-19 cases and 1,419 known deaths from the virus since the pandemic began.

Based on cases from Aug. 27 to Sept. 9, the Navajo Department of Health has issued an advisory for 35 communities because of uncontrolled spread of COVID-19.

Navajo officials are urging people to get vaccinated, wear masks while in public and minimize their travel.

Officials say all Navajo Nation executive branch employees will need to be fully vaccinated against the virus by the end of September or submit to regular testing.

The new rules apply to full, part-time and temporary employees, including those working for tribal enterprises like utilities, shopping centers and casinos.

Any worker who does not show proof of vaccination by Sept. 29 must be tested every two weeks or face discipline.

The tribe’s reservation is the country’s largest at 27,000 square miles and it covers parts of Arizona, New Mexico and Utah.