In all, the tribe has reported nearly 30,000 confirmed cases and 1,195 deaths from the virus since the pandemic began about a year ago.
Health facilities on the reservation and in border towns are conducting drive-thru vaccine events or administering doses by appointment. The Navajo-area Indian Health Service has vaccinated more than 135,000 people so far.
A daily curfew from 9 p.m. to 5 a.m. and a mask mandate remain in effect for residents of the vast reservation that covers parts of Arizona, New Mexico and Utah to prevent the spread of the virus.