The Navajo Department of Health issued a public health advisory for Hantavirus, a rare but potentially fatal disease.There have been four confirmed cases of Hantavirus within the Navajo Nation. The virus can be contracted from exposure to rodent droppings, …The Navajo Department of Health issued a public health advisory for Hantavirus, a rare but potentially fatal disease.There have been four confirmed cases of Hantavirus within the Navajo Nation. The virus can be contracted from exposure to rodent droppings, …