Scientists developing vaccines for the coronavirus disease say it’s critical to recruit diverse volunteers—especially Native Americans, who have been hit hard by the pandemic. That’s why Pfizer set up sites for its ongoing clinical trial on the Navajo and White Mountain Apache nations. But it’s not easy to repair decades of broken trust between Indigenous people and non-Native scientists. Historical traumas in the name of research remain fresh in many memories. KNAU’s Melissa Sevigny reports, some practitioners of both traditional Diné medicine and Western medicine want to heal that divide.