Carol Schumacher, 56, who was raised in the remote community of Chilchinbeto in the Navajo Nation, has lost 42 family members to Covid-19 over the last two years. The dead included two brothers aged 55 and 54, and cousins as young as 18 and 19. Ms. Schumacher returned to the Navajo Nation from her home in Wisconsin this summer to grieve with family. She knew what to expect, having grown up on the