Karen McKnight stands in her backyard on Saturday, June 19, 2021, in Sammamish, Wash., holding two books written by her brother Ross Bagne of Cheyenne, Wyo. Nearly all COVID-19 deaths in the United States now are in people who weren’t vaccinated like Bagne, a staggering demonstration of how effective the vaccines have been (AP Photo/John Froschauer)

Karen McKnight stands in her backyard on Saturday, June 19, 2021, in Sammamish, Wash., holding two books written by her brother Ross Bagne of Cheyenne, Wyo. Nearly all COVID-19 deaths in the United States now are in people who weren’t vaccinated like Bagne, a staggering demonstration of how effective the vaccines have been (AP Photo/John Froschauer)