A soldier assists an elderly woman as she arrives to receive a dose of the coronavirus disease vaccine at the New York State COVID-19 vaccination site at the Jacob K. Javits Convention Center, in New York City, U.S., January 15, 2021.

A nurse checks in on a person in a vehicle after receiving the coronavirus disease (COVID-19) vaccine at a drive through vaccination site at the TCF center in Detroit, Michigan, U.S., January 15, 2021.

A CalFire firefighter is administered his first dose of the Moderna vaccine in his arm by a CalFire Emergency Medical Technician during the outbreak of the coronavirus disease (COVID-19) in El Cajon, California, U.S., January 15, 2021.

People arrive to receive a doses of the coronavirus disease vaccine at the New York State COVID-19 vaccination site at the Jacob K. Javits Convention Center, in New York City, U.S., January 15, 2021.

A chain is seen on the gate at the 24 hour New York State coronavirus disease (COVID-19) mass vaccination site at the Brooklyn Army Terminal, the site was closed after running out of vaccine doses, in Brooklyn, New York, U.S., January 15, 2021.

COVID-19 mass-vaccination of healthcare workers takes place at Dodger Stadium in Los Angeles, California, U.S., January 15, 2021 . Irfan Khan/Pool via REUTERS

Soldiers work at the New York State coronavirus disease (COVID-19) vaccination site at the Jacob K. Javits Convention Center, in New York City, U.S., January 15, 2021.

A man uses his phone after being turned away for an appointment at the 24 hour New York State coronavirus disease (COVID-19) mass vaccination site at the Brooklyn Army Terminal, the site was closed after running out of vaccine doses, in Brooklyn, New York, U.S., January 15, 2021.

A healthcare worker draws the coronavirus disease (COVID-19) vaccine from a vial at Mission Commons assisted living community in Redlands, California, U.S., January 15, 2021.

Soldiers work at the New York State coronavirus disease (COVID-19) vaccination site at the Jacob K. Javits Convention Center, in New York City, U.S., January 15, 2021.

Nurses prepare for the next round of people waiting in their vehicles to receive the coronavirus disease (COVID-19) vaccine at a drive through vaccination site at the TCF center in Detroit, Michigan, U.S., January 15, 2021.

Dr. Richard Dang, assistant professor USC School of Pharmacy administers COVID-19 vaccine to Ashley Van Dyke (L) as mass-vaccination of healthcare workers takes place at Dodger Stadium in Los Angeles, California, U.S., January 15, 2021. Irfan Khan/Pool via REUTERS

A man arrives to receive a dose of the coronavirus disease vaccine at the New York State COVID-19 vaccination site at the Jacob K. Javits Convention Center, in New York City, U.S., January 15, 2021.

Nurses consult as people wait in their vehicles to receive the coronavirus disease (COVID-19) vaccine at a drive through vaccination site at the TCF center in Detroit, Michigan, U.S., January 15, 2021.

A healthcare worker draws the coronavirus disease (COVID-19) vaccine from a vial at Mission Commons assisted living community in Redlands, California, U.S., January 15, 2021.

World War II veteran William Lloyd Roberts, 94, and his wife, Erma Lee Hanna Roberts, 91, hold hands as they arrive to receive the coronavirus disease (COVID-19) vaccine at Mission Commons assisted living community in Redlands, California, U.S., January 15, 2021.

A worker is seen inside the 24 hour New York State coronavirus disease (COVID-19) mass vaccination site at the Brooklyn Army Terminal, the site was closed after running out of vaccine doses, in Brooklyn, New York, U.S., January 15, 2021.

A nurse consults with a person as they wait in their vehicle to receive the coronavirus disease (COVID-19) vaccine during a drive through vaccination site at the TCF center in Detroit, Michigan, U.S., January 15, 2021.

A man uses his phone after being turned away for an appointment at the 24 hour New York State coronavirus disease (COVID-19) mass vaccination site at the Brooklyn Army Terminal, the site was closed after running out of vaccine doses, in Brooklyn, New York, U.S., January 15, 2021.