Vice President-elect Kamala Harris receives the Moderna COVID-19 vaccine from nurse Patricia Cummings, Tuesday Dec. 29, 2020, at United Medical Center in southeast Washington. (AP Photo/Jacquelyn Martin)
Nurse practitioner, Tabe Mase gives US President-elect Joe Biden a dose of a vaccine against the coronavirus disease (COVID-19) at ChristianaCare Christiana Hospital, in Newark, Delaware, US. (Image: Reuters)
US Speaker of the House Nancy Pelosi (D-CA) receives the Pfizer-BioNTech COVID-19 vaccine by Dr Brian Monahan, attending physician of the United States Congress, at the Capitol in Washington, US. (Image: Reuters)
Acting US Defense Secretary Christopher Miller gets his first shot of the Pfizer-BioNTech COVID-19 vaccine, administered by HN Samantha Alvarez, at the Walter Reed National Military Medical Center in Bethesda, Maryland, US. (Image: Reuters)
Dr Anthony Fauci, director of the National Institute of Allergy and Infectious Diseases, elbow bumps U.S. Vice President Mike Pence, at an event where Pence received the coronavirus disease (COVID-19) vaccine at the White House in Washington, US. (Image: Reuters)
US Surgeon General Jerome Adams gives the thumbs up as he receives the coronavirus disease (COVID-19) vaccine at the White House in Washington, United States. (Image: Reuters)
US Vice President Mike Pence receives the COVID-19 vaccine at the White House in Washington. (Image: Reuters)
US Navy Command Master Chief Randy F Swanson receives a Pfizer COVID-19 vaccination at Walter Reed National Military Medical Center at in Bethesda, Maryland, US. (Image: Reuters)
Health and Human Services Secretary Alex Azar asks Dr Raymond Pla, an anesthesiologist at George Washington University Hospital, if his vaccination for COVID-19 hurt, in Washington. (Image: Reuters)
Physician Alister Martin receives one of the first doses of the Pfizer-BioNTech coronavirus disease (COVID-19) vaccine from RN Jennifer Lisciotti at Massachusetts General Hospital in Boston, Massachusetts, US. (Image: Reuters)
Justin Sambol, right, Senior Associate Dean for Clinical Affairs, receives the Pfizer-BioNTech coronavirus disease (COVID-19) vaccine from Ambulatory Care Technician Sady Ferguson, at Rutgers New Jersey Medical School for COVID-19 at University Hospital in Newark, New Jersey, US. (Image: Reuters)
New Jersey Governor Phil Murphy, watches as Maritza Beniquez, RN, reacts to receiving the Pfizer-BioNTech coronavirus disease (COVID-19) vaccine from Ambulatory Care Technician Sady Ferguson at Rutgers New Jersey Medical School for COVID-19 at University Hospital in Newark, New Jersey, US. (Image: Reuters)
Dr Tommy Wong holds up his vaccination record as he waits after he received one of the first vaccinations at Mt. Sinai Hospital from Pfizer-BioNTech, during the coronavirus disease (COVID-19) pandemic in the Manhattan borough of New York City, New York, US. (Image: Reuters)
Physician Luisa Vera reacts after receiving the Pfizer-BioNTech coronavirus disease (COVID-19) vaccine at Indiana University Health, Methodist Hospital in Indianapolis, Indiana, US. (Image: Reuters)