GOP voters could decide whether U.S. reaches herd immunity Dan Diamond, The Washington Post March 8, 2021 FacebookTwitterEmail Timothy Shea shows off his mask during the Conservative Political Action Conference CPAC in Orlando, Fla., in February 2021.Washington Post photo by Jabin Botsford Margaret, an 80-year-old retiree who lives near Tulsa, Okla., has spent the past year fearing the coronavirus. She's constantly worn masks, toted hand sanitizer and used drive-throughs to run her errands. Her age and preexisting health conditions - including heart failure, diabetes and blood clots- put her at elevated risk if she gets sick. But unlike many at-risk Americans seeking safety and an end to the pandemic, Margaret refuses to get a coronavirus vaccine.