In Alaska, some vaccine doses were transported to rural communities by dog sled. In Navajo Nation, doses were driven by police escort “to every corner,” Loretta Christensen, acting chief medical officer of the IHS, said. The idea, she said, was to “take …In Alaska, some vaccine doses were transported to rural communities by dog sled. In Navajo Nation, doses were driven by police escort “to every corner,” Loretta Christensen, acting chief medical officer of the IHS, said. The idea, she said, was to “take …