Security workers in protective suit prepare for administering COVID-19 testings for workers at the parking lot of the Shanghai Pudong International Airport in Shanghai, Monday, Nov. 23, 2020. Chinese authorities are testing millions of people, imposing lockdowns and shutting down schools after multiple locally transmitted coronavirus cases were discovered in three cities across the country last week. (AP Photo)

Protesters gather for a demonstration in Hamburg, Germany, Sunday Nov. 22, 2020, to oppose the restriction measures in place to control the spread of the coronavirus. (Georg Wendt/dpa via AP)

A nurse walks COVID-19 tests back to the tent at the free COVID-19 testing site on Monday, Nov. 23, 2020 in Glenwood Springs, Colo. (Chelsea Self/Glenwood Springs Post Independent via AP)

FILE - In this Dec. 12, 2019 file photo, pilgrims arrive at the plaza outside the Basilica of Our Lady of Guadalupe in Mexico City. Due to the COVID-19 pandemic, the Mexican Catholic Church announced on Monday, Nov. 23, 2020 the cancelation of the annual pilgrimage, the largest Catholic pilgrimage worldwide. (AP Photo/Marco Ugarte, File)

FILE - In this Tuesday, Nov. 10, 2020 file photo, British Prime Minister Boris Johnson leaves 10 Downing Street in London, to attend a weekly cabinet meeting at the Foreign, Commonwealth & Development Office, in London. Boris Johnson's office said late Saturday Nov. 21, 2020, there are plans to end the England-wide lockdown as scheduled on Dec. 2 and to announce a return to regional restrictions as statistics show coronavirus infections have stabilized. (AP Photo/Matt Dunham, File)

Students have their temperature checked and disinfect their hands to avoid the contact of coronavirus before their morning classes at Preah Sisowath high school, in Phnom Penh, Cambodia, Monday, Nov. 23, 2020. Cambodia on Monday reopened schools after the country banned all state-organized events in the capital and a neighboring province for two weeks to prevent the spread of the coronavirus after a number of people connected to a Hungarian official's visit tested positive in early the month of November. (AP Photo/Heng Sinith)

People wearing face masks to help curb the spread of the coronavirus chat each other as a man performs morning exercise at a park in Beijing, Monday, Nov. 23, 2020. (AP Photo/Andy Wong)

Students wearing face masks sit spaced apart during a trial run of a class with COVID-19 protocol at Nurul Amal Islamic school in Tangerang, Indonesia, Monday, Nov. 23, 2020. (AP Photo/Tatan Syuflana)

A Sri Lankan health official carries a test kit to inspect residents at a housing complex as they prepare to collect swab samples to test for COVID-19 in Colombo, Sri Lanka, Monday, Nov. 23, 2020. (AP Photo/Eranga Jayawardena)

In this undated image from video provided by Regeneron Pharmaceuticals on Friday, Oct. 2, 2020, scientists work with a bioreactor at a company facility in New York state, for efforts on an experimental coronavirus antibody drug. The Food and Drug Administration on Saturday, Nov. 21, 2020 authorized the use of the Regeneron Pharmaceuticals Inc. drug to try to prevent patients with mild-to-moderate disease from worsening and needing hospitalization. It's given as a one-time treatment through an IV and is still going through more testing to establish its safety and effectiveness. (Regeneron via AP)

FILE - In this file photo dated Friday, February 1, 2019, Mike Ryan, WHO Assistant Director-General for Emergencies, during a press conference, at the European headquarters of the United Nations in Geneva, Switzerland. At the start of a week-long meeting on Monday Nov. 9, 2020, Ryan said the WHO tries to work with member states constructively, but the World Health Organization is under intense pressure to reform following its response to the coronavirus pandemic. (Salvatore Di Nolfi/Keystone FILE via AP)

Annette Delaney, 54, a travel escort at Ambassador Nursing & Rehabilitation Center in Albany Park, leads a rally of striking Infinity Healthcare Management workers outside the Northwest Side facility, Monday, Nov. 23, 2020. Nearly 700 workers walked off the job Monday at 11 Infinity facilities across the Chicago area, saying they won't return until the company offers them higher wages and safer working conditions. (Ashlee Rezin Garcia/Chicago Sun-Times via AP)

Nurse Franziska Strauss documents the treatment steps next to the bed of a Covid-19 patient at the intensive care unit of the University Hospital in Greifswald . Covid-19 patients have been treated at the University Hospital since the beginning of the pandemic. (Jens Buettner/dpa via AP)

In this screen shot provided by ABC on Sunday, Nov. 22, 2020, Bad Bunny accepts the award for favorite latin album for “YHLQMDLG” at the American Music Awards at the Microsoft Theater in Los Angeles. (ABC via AP)

FILE - In this Wednesday, June 24, 2020 file photo, a volunteer receives an injection at the Chris Hani Baragwanath hospital in Soweto, Johannesburg, as part of Africa's first participation in a COVID-19 vaccine trial developed at the University of Oxford in Britain in conjunction with the pharmaceutical company AstraZeneca. AstraZeneca says late-stage trials of its COVID-19 vaccine were "highly effective'' in preventing disease. A vaccine developed by AstraZeneca and the University of Oxford prevented 70% of people from developing the coronavirus in late-stage trials, the team reported Monday Nov. 23, 2020. (Siphiwe Sibeko/Pool via AP)

Students wearing face masks sit spaced apart during a trial run of a class with COVID-19 protocol at the Nurul Amal Islamic school in Tangerang, Indonesia, Monday, Nov. 23, 2020. (AP Photo/Tatan Syuflana)

FILE - In this Thursday, April 23, 2020 file screen grab taken from video issued by Britain's Oxford University, showing a person being injected as part of the first human trials in the UK to test a potential coronavirus vaccine, untaken by Oxford University in England. AstraZeneca says late-stage trials of its COVID-19 vaccine were “highly effective’’ in preventing disease. A vaccine developed by AstraZeneca and the University of Oxford prevented 70% of people from developing the coronavirus in late-stage trials, the team reported Monday Nov. 23, 2020. (Oxford University Pool via AP, File)

FILE - In this Saturday, July 18, 2020 file photo a general view of AstraZeneca offices and the corporate logo in Cambridge, England. AstraZeneca says late-stage trials of its COVID-19 vaccine were "highly effective'' in preventing disease. A vaccine developed by AstraZeneca and the University of Oxford prevented 70% of people from developing the coronavirus in late-stage trials, the team reported Monday Nov. 23, 2020.(AP Photo/Alastair Grant, File)

In this Oct. 19, 2020 photo, Cuba High School senior Cyliss Castillo shows off his slap bracelet USB drive loaded with assignments that was delivered by school bus driver Kelly Maeastas, outside Cuba, New Mexico. The closing of classrooms and the switch to remote learning because of the coronavirus outbreak have left Castillo and other students in this school district on the sparsely populated fringe of the Navajo Nation in New Mexico profoundly isolated, cut off from other people — and, in many cases, the grid — by sheer distance. (AP Photo/Cedar Attanasio)

Vehicles line up as healthcare workers help to check-in as citizens are being tested at the COVID-19 drive-thru testing center at Hard Rock Stadium in Miami Gardens on Sunday, Nov. 22, 2020. (David Santiago/Miami Herald via AP)

A man has his temperature checked prior to entering a store in Montreal, Sunday, Nov. 22, 2020, as the COVID-19 pandemic continues in Canada and around the world. (Graham Hughes/The Canadian Press via AP)

People pass a social distancing sign in Cardiff, where restrictions across Wales have been relaxed following a two-week "firebreak" lockdown, Sunday, Nov. 22, 2020. First Minister Mark Drakeford has said there is evidence that the firebreak in Wales had successfully had an impact on lowering the rate of coronavirus transmission. (Ben Birchall/PA via AP)

Sri Lankan health officials prepare to collect swab samples to test for COVID-19 in Colombo, Sri Lanka, Monday, Nov. 23, 2020. (AP Photo/Eranga Jayawardena)

Vehicles line up as healthcare workers help to check-in as citizens is being tested at the COVID-19 drive-thru testing center at Hard Rock Stadium in Miami Gardens on Sunday, Nov. 22, 2020. (David Santiago/Miami Herald via AP)

People walking on Tynemouth beach, as England continues a four week national lockdown to curb the spread of coronavirus, in Tyne and Wear, England, Sunday, Nov. 22, 2020. (Owen Humphreys/PA via AP)

A Swiss army soldier, left, wearing personal protective equipment helps hospital's physiotherapists to mobilize a COVID-19 patient in the intermediate care units of Geneva University Hospitals (HUG), during the coronavirus disease (COVID-19) outbreak, in Geneva, Switzerland, Tuesday, Nov. 17, 2020. Switzerland, as many countries in Europe, requisitioned members of the Civil Protection, the Swiss army and also firefighter to help medical workers in hospitals as cases of Covid-19 patients spike in a second wave of pandemic. (Laurent Gillieron/Keystone via AP)

A worker in a protective suit takes a throat swab for a COVID-19 test in Wenchang in southern China's Hainan Province, Sunday, Nov. 22, 2020. Authorities are conducting mass testing and shutting down schools after China reported three new domestically transmitted cases in the past 24 hours - two in northern Inner Mongolia province and one in Shanghai. (AP Photo/Mark Schiefelbein)