June 23, 2021 A National Guard soldier speaks to a COVID-19 patient at a Navajo Nation in Chinle in this June, 2020, photo. Cases on the Navajo Nation have fallen sharply since then, but tribal officials remain wary of the highly contagious Delta variant of the virus. (Photo by Tech. Sgt. Michael Matkin/National Guard). WASHINGTON – The Navajo Nation has yet to record a single case of the Delta variant of COVID-19, but now is not the time for tribe members to let down their guard, Navajo President Jonathan Nez said Wednesday. Nez spent much of the time during a Washington Post program on public health talking about the Navajos’ success in fighting the pandemic, falling from a national COVID-19 hotspot at one point last year to negligible case numbers today.