"We are truly in crisis mode," one infectious disease specialist in the area said.
Tribal officials warned residents of new “uncontrolled spread” of the coronavirus in 34 communities on the reservation.
"The overwhelming turnout in tribal communities in the state of Arizona was key," said Navajo Nation president Jonathan Nez.
The 28 deaths at Fort Hood include five homicides, as well as accidents, suicides, deaths related to illness, cases still under investigation and one combat-related death.
More than two dozen soldiers from Fort Hood have died this year. The latest was Pvt. Corlton L. Chee, a member of the Navajo Nation.
A tribal leader at the GOP National Convention praised Trump for giving tribes $8 billion in COVID aid. He wanted to give them $0.
A former Trump chief of staff sold Chinese masks to the government just as federal regulators were scrutinizing foreign-made equipment.
"At every turn, the Trump administration has failed to live up to its trust responsibility to tribes across the country," fumed Sen. Tom Udall (D-N.M.).
The nation's most populous reservation has a higher per capita coronavirus infection rate than any state.
There have been at least 100 deaths on the country's most populous American Indian reservation.