WILMINGTON, DELAWARE – JANUARY 11: President-elect Joe Biden receives the second dose of the Pfizer/BioNTech COVID-19 vaccination from Chief Nurse Executive Ric Cuming at ChristianaCare Christiana Hospital on January 11, 2021 in Newark, Delaware. Biden received the second dose of the coronavirus vaccine three weeks after his first dose, received a few days before Christmas. (Photo by Alex Wong/Getty Images)