FILE - DeMarcus Hicks, a recent graduate of nursing school who is working as a contractor with the Federal Emergency Management Agency, gives a person a Pfizer COVID-19 vaccine booster shot, Dec. 20, 2021, on the first day of a COVID-19 vaccination clinic in Federal Way, Wash. The Supreme Court will hear oral arguments Jan. 7, 2022, on challenges to whether the Biden administration can order millions of workers at private companies and health care employees be vaccinated for COVID-19. Until the court rules, millions of workers face a patchwork of requirements depending on where they live. (AP Photo/Ted S. Warren, File)