WINDOW ROCK, Ariz. (AP) — The Navajo Nation on Monday reported 20 more COVID-19 cases, but no additional deaths. The latest numbers pushed the tribe’s totals to 33,800 confirmed COVID-19 cases from the virus since the pandemic began more than a year ago. The known death toll remains at 1,442. Based on cases from Sept. 10-23, the Navajo Department of Health issued an advisory for 40 communities due to an uncontrolled spread of COVID-19. Navajo officials are urging people to get vaccinated, wear masks while in public and minimize their travel. Officials said all Navajo Nation executive branch employees will need to be fully vaccinated against the virus by the end of this month or submit to regular testing.