N.F.L. Vaccine Holdouts Face Training Camp Scrutiny. Football, Vaccination and Immunization, Black People, Blacks, Coronavirus (2019-nCoV), Indianapolis Colts, National Football League, Washington Redskins, Denver Broncos, Ballard, Chris (1969- ), Beasley, Cole (1989- ), Prescott, Dak (1993- ), Hilton, T Y