Amir Khalil, head of project development at FOUR PAWS International, and Frank Goeritz, head of the veterinary service at Leibniz Institute for zoo and wildlife research in Berlin, perform tests on Kaavan, an elephant to be transported to a sanctuary in Cambodia, at the Marghazar Zoo in Islamabad, Pakistan November 29, 2020. REUTERS/Saiyna Bashir

Skaters perform during the opening of an outdoor skating rink in the Red Square in Moscow, Russia November 28, 2020. REUTERS/Maxim Shemetov

Skaters perform during the opening of an outdoor skating rink in the Red Square in Moscow, Russia November 28, 2020. REUTERS/Maxim Shemetov

Figure skaters perform during the opening of an outdoor skating rink in the Red Square in Moscow, Russia November 28, 2020. REUTERS/Maxim Shemetov

An artist of the Moscow residence of Father Frost performs for children with disabilities in Moscow, Russia November 28, 2020. REUTERS/Shamil Zhumatov

An artist of the Moscow residence of Father Frost performs for children with disabilities in Moscow, Russia November 28, 2020. REUTERS/Shamil Zhumatov

Artists of the Moscow residence of Father Frost perform for children with disabilities in Moscow, Russia November 28, 2020. REUTERS/Shamil Zhumatov

Artists of the Moscow residence of Father Frost perform for children with disabilities in Moscow, Russia November 28, 2020. REUTERS/Shamil Zhumatov

An artist of the Moscow residence of Father Frost performs for children with disabilities in Moscow, Russia November 28, 2020. REUTERS/Shamil Zhumatov

An artist of the Moscow residence of Father Frost performs for children with disabilities in Moscow, Russia November 28, 2020. REUTERS/Shamil Zhumatov

Artists of the Moscow residence of Father Frost perform for children with disabilities in Moscow, Russia November 28, 2020. REUTERS/Shamil Zhumatov

An artist of the Moscow residence of Father Frost performs for children with disabilities in Moscow, Russia November 28, 2020. REUTERS/Shamil Zhumatov

Artists of the Moscow residence of Father Frost perform for children with disabilities in Moscow, Russia November 28, 2020. REUTERS/Shamil Zhumatov

Civil protection agents Karim Melliti and Mehdi Ben Khaelifa perform an antigenic rapid test at the screening center of La Tour Hospital as Swiss civil protection agents are deployed to help during the coronavirus disease (COVID-19) outbreak in Meyrin near Geneva, Switzerland, November 26, 2020. Picture taken November 26, 2020. REUTERS/Denis Balibouse

Civil protection agent Mehdi Ben Khaelifa performs an antigenic rapid test at the screening center of La Tour Hospital as Swiss civil protection agents are deployed to help during the coronavirus disease (COVID-19) outbreak in Meyrin near Geneva, Switzerland, November 26, 2020. Picture taken November 26, 2020. REUTERS/Denis Balibouse

Anti-shopping performance artist who goes by the name Reverend Billy Talen of the Church of Stop Shopping participates in a protest called "Make Amazon Pay", at the building where Bezos lives in Manhattan, New York, U.S., November 27, 2020. REUTERS/Eduardo Munoz

Anti-shopping performance artist who goes by the name Reverend Billy Talen of the Church of Stop Shopping participates in a protest called "Make Amazon Pay", at the building where Bezos lives in Manhattan, New York, U.S., November 27, 2020. REUTERS/Eduardo Munoz

Anti-shopping performance artist who goes by the name Reverend Billy Talen of the Church of Stop Shopping participates in a protest called "Make Amazon Pay", at the building where Bezos lives in Manhattan, New York, U.S., November 27, 2020. REUTERS/Eduardo Munoz

Rugby League - Super League Grand Final - Wigan Warriors v St Helens - KCOM Stadium, Hull, Britain - November 27, 2020 Singer Laura Wright performs during the opening ceremony Action Images/Lee Smith

Anti-shopping performance artist who goes by the name Reverend Billy Talen of the Church of Stop Shopping participates in a protest called "Make Amazon Pay", at the building where Bezos lives in Manhattan, New York, U.S., November 27, 2020. REUTERS/Eduardo Munoz

Anti-shopping performance artist who goes by the name Reverend Billy Talen of the Church of Stop Shopping participates in a protest called "Make Amazon Pay", at the building where Bezos lives in Manhattan, New York, U.S., November 27, 2020. REUTERS/Eduardo Munoz TPX IMAGES OF THE DAY

A street musician performs, as the spread of the coronavirus disease (COVID-19) continues, in Naples, Italy November 27, 2020. REUTERS/Yara Nardi

A performer at the Zavatelli Circus owned by the French family Dubois, walks in a parking lot where the circus, together with two other Armanzo and Anderland, also owned by the same family, has been maintained under lockdown for about a year, amid the coronavirus disease (COVID-19) outbreak, in Gembloux, Belgium November 26, 2020. Picture taken November 26, 2020. REUTERS/Yves Herman

A health worker performs a swab test for detection of the coronavirus disease (COVID-19) at a school turned evacuation center for residents affected by Typhoon Vamco, in Rodriguez, Rizal, Philippines, November 27, 2020. REUTERS/Eloisa Lopez

A health worker asks questions to a boy before performing a swab test to detect the coronavirus disease (COVID-19) at a school turned evacuation center for residents affected by Typhoon Vamco, in Rodriguez, Rizal, Philippines, November 27, 2020. REUTERS/Eloisa Lopez

A health worker performs a swab test for detection of the coronavirus disease (COVID-19) at a school turned evacuation center for residents affected by Typhoon Vamco, in Rodriguez, Rizal, Philippines, November 27, 2020. REUTERS/Eloisa Lopez

A nurse performs a PCR test at the screening center of Hospital de la Tour during the coronavirus disease (COVID-19) outbreak in Meyrin near Geneva, Switzerland, November 26, 2020. REUTERS/Denis Balibouse

A nurse performs a PCR test at the screening center of Hospital de la Tour during the coronavirus disease (COVID-19) outbreak in Meyrin near Geneva, Switzerland, November 26, 2020. REUTERS/Denis Balibouse

Violinist Maxine Kwok plays Bizet's "Carmen Suite" in a socially-distanced London Symphony Orchestra rehearsal after a lab-free rapid Covid-19 bubble test gives them the confidence to perform again at LSO St Luke's in London, Britain November 24, 2020, in this still image taken from a video. Video taken November 24, 2020. REUTERS/Stuart McDill

Managing Director of the London Symphony Orchestra, Kathryn McDowell, discusses the rapid Covid-19 bubble test that has given the organisation the confidence to perform again at LSO St Luke's in London, Britain November 24, 2020, in this still image taken from a video. Video taken November 24, 2020. REUTERS/Stuart McDill

A socially-distanced London Symphony Orchestra rehearse after a lab-free rapid Covid-19 bubble test gives them the confidence to perform again at LSO St Luke's, in London, Britain November 24, 2020, in this still image taken from a video. Video taken November 24, 2020. REUTERS/Stuart McDill

Children perform during a school nativity show as it is filmed for parents at Heath Mount School in Watton at Stone in Hertfordshire, Britain, November 26, 2020. REUTERS/Andrew Couldridge

Children perform a school nativity show as it is filmed for parents at Heath Mount School in Watton at Stone in Hertfordshire, Britain, November 26, 2020. REUTERS/Andrew Couldridge

Man uses a mobile phone before 'Circo Pastelito' artists perform for the media ahead of opening the circus under a sanitary protocol against COVID-19 spread in Santiago, Chile November 25, 2020. REUTERS/Ivan Alvarado

Artist from 'Circo Pastelito' performs for the media ahead of opening the circus under a sanitary protocol against COVID-19 spread in Santiago, Chile November 25, 2020. REUTERS/Ivan Alvarado

Clowns from 'Circo Pastelito' perform for the media ahead of opening the circus under a sanitary protocol against COVID-19 spread in Santiago, Chile November 25, 2020. REUTERS/Ivan Alvarado

Man uses a mobile phone as artists of 'Circo Pastelito' perform while preparing to open the circus under a sanitary protocol against COVID-19 spread in Santiago, Chile November 25, 2020. REUTERS/Ivan Alvarado

Woman wears a face shield as she watches artists of 'Circo Pastelito' perform while it prepares to open under a sanitary protocol against COVID-19 spread in Santiago, Chile November 25, 2020. REUTERS/Ivan Alvarado

Artist from the 'Circo Pastelito' performs as the circus prepares to open under a sanitary protocol against COVID-19 spread in Santiago, Chile November 25, 2020. REUTERS/Ivan Alvarado

Artist from the 'Circo Pastelito' performs as the circus prepares to open under a sanitary protocol against COVID-19 spread in Santiago, Chile November 25, 2020. REUTERS/Ivan Alvarado

Artist from the 'Circo Pastelito' performs as the circus prepares to open under a sanitary protocol against COVID-19 spread in Santiago, Chile November 25, 2020. REUTERS/Ivan Alvarado

New York City Police Department (NYPD) Sheriffs stop vehicles at a checkpoint to perform COVID-19 compliance checks on drivers entering Manhattan from the Holland Tunnel during the outbreak of the coronavirus disease (COVID-19) in New York City, New York, U.S., November 25, 2020. REUTERS/Mike Segar

A New York City Police Department (NYPD) Sheriff stops vehicles at a checkpoint to perform COVID-19 compliance checks on drivers entering Manhattan from the Holland Tunnel during the outbreak of the coronavirus disease (COVID-19) in New York City, New York, U.S., November 25, 2020. REUTERS/Mike Segar

A New York City Police Department (NYPD) Sheriff stops vehicles at a checkpoint to perform COVID-19 compliance checks on drivers entering Manhattan from the Holland Tunnel during the outbreak of the coronavirus disease (COVID-19) in New York City, New York, U.S., November 25, 2020. REUTERS/Mike Segar

New York City Police Department (NYPD) Sheriffs stop vehicles at a checkpoint to perform COVID-19 compliance checks on drivers entering Manhattan from the Holland Tunnel during the outbreak of the coronavirus disease (COVID-19) in New York City, New York, U.S., November 25, 2020. REUTERS/Mike Segar

New York City Police Department (NYPD) Sheriffs stop vehicles at a checkpoint to perform COVID-19 compliance checks on drivers entering Manhattan from the Holland Tunnel during the outbreak of the coronavirus disease (COVID-19) in New York City, New York, U.S., November 25, 2020. REUTERS/Mike Segar

New York City Police Department (NYPD) Sheriffs stop vehicles at a checkpoint to perform COVID-19 compliance checks on drivers entering Manhattan from the Holland Tunnel during the outbreak of the coronavirus disease (COVID-19) in New York City, New York, U.S., November 25, 2020. REUTERS/Mike Segar

New York City Police Department (NYPD) Sheriffs stop vehicles at a checkpoint to perform COVID-19 compliance checks on drivers entering Manhattan from the Holland Tunnel during the outbreak of the coronavirus disease (COVID-19) in New York City, New York, U.S., November 25, 2020. REUTERS/Mike Segar

New York City Police Department (NYPD) Sheriffs stop vehicles at a checkpoint to perform COVID-19 compliance checks on drivers entering Manhattan from the Holland Tunnel during the outbreak of the coronavirus disease (COVID-19) in New York City, New York, U.S., November 25, 2020. REUTERS/Mike Segar

A New York City Police Department (NYPD) Sheriff stops vehicles at a checkpoint to perform COVID-19 compliance checks on drivers entering Manhattan from the Holland Tunnel during the outbreak of the coronavirus disease (COVID-19) in New York City, New York, U.S., November 25, 2020. REUTERS/Mike Segar

A student of Newcastle Sixth Form College performs a lateral flow antigen test next to a member of the British Royal Air Force, amid the spread of the coronavirus disease (COVID-19), in Newcastle upon Tyne, Britain, November 25, 2020. REUTERS/Lee Smith

Lateral flow antigen test samples are pictures as students of Newcastle Sixth Form College perform a test, amid the spread of the coronavirus disease (COVID-19), in Newcastle upon Tyne, Britain, November 25, 2020. REUTERS/Lee Smith

A student of Newcastle Sixth Form College performs a lateral flow antigen test, amid the spread of the coronavirus disease (COVID-19), in Newcastle upon Tyne, Britain, November 25, 2020. REUTERS/Lee Smith

Student of Newcastle Sixth Form College perform a test, amid the spread of the coronavirus disease (COVID-19), in Newcastle upon Tyne, Britain, November 25, 2020. REUTERS/Lee Smith

A student of Newcastle Sixth Form College performs a lateral flow antigen test, amid the spread of the coronavirus disease (COVID-19), in Newcastle upon Tyne, Britain, November 25, 2020. REUTERS/Lee Smith

A student of Newcastle Sixth Form College performs a lateral flow antigen test, amid the spread of the coronavirus disease (COVID-19), in Newcastle upon Tyne, Britain, November 25, 2020. REUTERS/Lee Smith

A student of Newcastle Sixth Form College performs a lateral flow antigen test, amid the spread of the coronavirus disease (COVID-19), in Newcastle upon Tyne, Britain, November 25, 2020. REUTERS/Lee Smith

A student of Newcastle Sixth Form College performs a lateral flow antigen test, amid the spread of the coronavirus disease (COVID-19), in Newcastle upon Tyne, Britain, November 25, 2020. REUTERS/Lee Smith

Cheerleaders at Louise High School perform in the auditorium as other students watch during a pep rally, as the coronavirus disease (COVID-19) pandemic continues in Louise, Texas, U.S., November 20, 2020. Picture taken November 20, 2020. To match Special Report: HEALTH-CORONAVIRUS/SCHOOLS-REOPENING. REUTERS/Go Nakamura

Lion dance performers, wearing face masks following the coronavirus disease (COVID-19) outbreak, sit on a Caterpillar equipment at the construction machinery trade fair Bauma China in Shanghai, China November 25, 2020. REUTERS/Aly Song