A pharmacy technician from Croydon Health Services prepares to store the first delivery of COVID-19 vaccine at Croydon University Hospital in Croydon, England, Saturday Dec. 5, 2020. The first batch of Pfizer COVID-19 vaccine is delivered to the area in preparation for public dispersal. (Gareth Fuller/Pool via AP)

Masked customers wait for their take out order at Hugo's Tacos in the Studio City section of Los Angeles on Sunday Dec. 6, 2020. Many Californians were preparing Sunday for a new stay-at-home order that bars restaurant dining, shutters salons and limits retail in an effort to curb spiraling coronavirus infections and hospitalizations. (AP Photo/Richard Vogel)

FILE - Former Mayor of New York Rudy Giuliani, a lawyer for President Donald Trump, speaks during a news conference at the Republican National Committee headquarters, Thursday Nov. 19, 2020, in Washington. President Donald Trump says his personal attorney Rudy Giuliani has tested positive for coronavirus. The president on Sunday, Dec. 6, 2020 confirmed in a tweet that Giuliani had tested positive for the virus. Giuliani has traveled extensively to battleground states in effort to help Trump subvert his election loss. (AP Photo/Jacquelyn Martin, file)

The entrance to Croydon University Hospital which has taken delivery of the first batch of COVID-19 vaccine, in Croydon, England, Saturday Dec. 5, 2020. The first batch of Pfizer COVID-19 vaccine is delivered to the hospital in preparation for a public coronavirus inoculation program, with each person needing two injections and the vaccine stored at extremely low temperature. (Gareth Fuller/Pool via AP)

A pharmacy technician from Croydon Health Services works to store the first delivery of COVID-19 vaccine, with temperature at right reading minus 82, at Croydon University Hospital in Croydon, England, Saturday Dec. 5, 2020. The first batch of Pfizer COVID-19 vaccine is delivered to the area in preparation for public dispersal. (Gareth Fuller/Pool via AP)

A protester wearing a mask depicting U.S. president Donald Trump holds a sign during a protest against Israel's Prime Minister Benjamin Netanyahu outside his residence in Jerusalem, Saturday, Dec. 5, 2020. Several thousand protesters gathered outside the official resident of Prime Minister Benjamin Netanyahu on Saturday, demanding his resignation as the country moves toward an early election. (AP Photo/Oded Balilty)

People wearing face masks to help curb the spread of the coronavirus walk by a moral depicting China's skyscrapers along a street in Beijing, Sunday, Dec. 6, 2020. Provincial governments across China are placing orders for experimental, domestically made coronavirus vaccines, though health officials have yet to say how well they work or how they may reach the country's 1.4 billion people. (AP Photo/Andy Wong)

Medial workers carry a patient infected with the coronavirus onto an ambulance at an elderly care facility in Ulsan, South Korea, Monday, Dec. 7, 2020. South Korea's health minister said Monday that the Seoul metropolitan area is now a "COVID-19 war zone," as the country reported another 615 new infections and the virus appeared to be spreading faster. (Kim Young-tae/Yonhap via AP)

Activists light about 5,000 candles to commemorate the people who died of the coronavirus in Switzerland, Sunday, Dec. 6, 2020, on the Bundesplatz, front of the Federal Palace, in Bern, Switzerland. (Anthony Anex/Keystone via AP)

Activists light about 5,000 candles to commemorate the people who died of the coronavirus in Switzerland, Sunday, Dec. 6, 2020, on the Bundesplatz, front of the Federal Palace, in Bern, Switzerland. (Anthony Anex/Keystone via AP)

Lakshmi Davulur prepares a sandwich for a lunch patron at the San Francisco Deli in Redding, Calif., Thursday, Dec. 3, 2020. Brenda Luntey, who owns the deli with her husband, is openly violating the state's order to close her restaurant to indoor dining. She takes all the precautions advised, but doesn't force customers to wear a face mask. "I want people to understand we are not thumbing our nose at the government,"said Luntey, "I'm trying to keep my business alive." (AP Photo/Rich Pedroncelli)

A pharmacy technician from Croydon Health Services prepares to store the first delivery of COVID-19 vaccine at Croydon University Hospital in Croydon, England, Saturday Dec. 5, 2020. The first batch of Pfizer COVID-19 vaccine is delivered to the area in preparation for public dispersal. (Gareth Fuller/Pool via AP)

Red lamps burn at the longtime closed Opera house in Munich, Germany, Sunday, Dec. 6, 2020. Bavaria intensifies measures to contain the corona crisis from Dec. 9, 2020. (AP Photo/Matthias Schrader)

People wearing face masks in front of a giant Christmas tree at the famous 'Marienplatz' in Munich, Germany, Sunday, Dec. 6, 2020. Christmas markets are canceled or diminished because of the coronavirus pandemic this year. (AP Photo/Matthias Schrader)

A pharmacy technician from Croydon Health Services prepares to store the first delivery of COVID-19 vaccine, with temperature at right reading minus 82, at Croydon University Hospital in Croydon, England, Saturday Dec. 5, 2020. The Croydon University Hospital has taken delivery of the first batch of Pfizer COVID-19 vaccine in preparation or a public inoculation program, with each person needing two injections and the vaccine stored at extremely low temperature.(Gareth Fuller/Pool via AP)

Nurses of a private laboratory work on COVID-19 tests Sunday, Dec.6, 2020 in Algiers. Algeria received rapid antigen testing kits, adding plans to widen access to the tests across the country by March 2021, and increase the number of private laboratories approved to run PCR tests. (AP Photo/Fateh Guidoum)

Both sides of a record card are displayed, that will be given to all recipients of the Pfizer coronavirus vaccine, at Croydon University Hospital Saturday Dec. 5, 2020. The Croydon University Hospital has taken delivery of the first batch of Pfizer COVID-19 vaccine in preparation or a public inoculation program, with each person needing two injections and the vaccine stored at extremely low temperature. (Gareth Fuller/Pool via AP)