St John's Ambulance volunteers attend the coronavirus disease (COVID-19) vaccinator training course at the Princess Anne Training Centre in Derby, Britain November 28, 2020. REUTERS/Lee Smith

St John's Ambulance volunteers attend the coronavirus disease (COVID-19) vaccinator training course at the Princess Anne Training Centre in Derby, Britain November 28, 2020. REUTERS/Lee Smith

St John's Ambulance volunteers attend the coronavirus disease (COVID-19) vaccinator training course at the Princess Anne Training Centre in Derby, Britain November 28, 2020. REUTERS/Lee Smith

St John's Ambulance volunteers attend the coronavirus disease (COVID-19) vaccinator training course at the Princess Anne Training Centre in Derby, Britain November 28, 2020. REUTERS/Lee Smith

St John's Ambulance volunteers attend the coronavirus disease (COVID-19) vaccinator training course at the Princess Anne Training Centre in Derby, Britain November 28, 2020. REUTERS/Lee Smith

A St John's Ambulance volunteer takes notes during a coronavirus disease (COVID-19) vaccinator training course at the Princess Anne Training Centre in Derby, Britain November 28, 2020. REUTERS/Lee Smith

A St John's Ambulance volunteer holds a workbook during a coronavirus disease (COVID-19) vaccinator training course at the Princess Anne Training Centre in Derby, Britain November 28, 2020. REUTERS/Lee Smith

A St John's Ambulance volunteer holds a syringe during a coronavirus disease (COVID-19) vaccinator training course at the Princess Anne Training Centre in Derby, Britain November 28, 2020. REUTERS/Lee Smith

St John's Ambulance volunteers attend the coronavirus disease (COVID-19) vaccinator training course at the Princess Anne Training Centre in Derby, Britain November 28, 2020. REUTERS/Lee Smith

St John's Ambulance volunteers attend the coronavirus disease (COVID-19) vaccinator training course at the Princess Anne Training Centre in Derby, Britain November 28, 2020. REUTERS/Lee Smith

St John's Ambulance volunteers attend the coronavirus disease (COVID-19) vaccinator training course at the Princess Anne Training Centre in Derby, Britain November 28, 2020. REUTERS/Lee Smith

St John's Ambulance volunteers attend the coronavirus disease (COVID-19) vaccinator training course at the Princess Anne Training Centre in Derby, Britain November 28, 2020. REUTERS/Lee Smith

Michela takes part in a socially distanced one on one training session with trainer Dec in Springfield Park, amid the outbreak of the coronavirus disease (COVID-19), in London, Britain, November 27, 2020. REUTERS/Andrew Couldridge

Michela takes part in a socially distanced one on one training session with trainer Dec in Springfield Park, amid the outbreak of the coronavirus disease (COVID-19), in London, Britain, November 27, 2020. REUTERS/Andrew Couldridge

Michela takes part in a socially distanced one on one training session with trainer Dec in Springfield Park, amid the outbreak of the coronavirus disease (COVID-19), in London, Britain, November 27, 2020. REUTERS/Andrew Couldridge

Michela takes part in a socially distanced one on one training session with trainer Dec in Springfield Park, amid the outbreak of the coronavirus disease (COVID-19), in London, Britain, November 27, 2020. REUTERS/Andrew Couldridge

Michela takes part in a socially distanced one on one training session with trainer Dec in Springfield Park, amid the outbreak of the coronavirus disease (COVID-19), in London, Britain, November 27, 2020. REUTERS/Andrew Couldridge

Michela takes part in a socially distanced one on one training session with trainer Dec (not pictured) in Springfield Park, amid the outbreak of the coronavirus disease (COVID-19), in London, Britain, November 27, 2020. REUTERS/Andrew Couldridge

Michela takes part in a socially distanced one on one training session with trainer Dec (not pictured) in Springfield Park, amid the outbreak of the coronavirus disease (COVID-19), in London, Britain, November 27, 2020. REUTERS/Andrew Couldridge

Michela takes part in a socially distanced one on one training session with trainer Dec (not pictured) in Springfield Park, amid the outbreak of the coronavirus disease (COVID-19), in London, Britain, November 27, 2020. REUTERS/Andrew Couldridge

Michela takes part in a socially distanced one on one training session with trainer Dec in Springfield Park, amid the outbreak of the coronavirus disease (COVID-19), in London, Britain, November 27, 2020. REUTERS/Andrew Couldridge

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

Kevin Dubois, director of the Zavatelli Circus owned by the French family Dubois, trains 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

Kevin Dubois, director of the Zavatelli Circus owned by the French family Dubois, trains 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

Rugby Union - Autumn Nations Cup - England Training - The Lensbury Hotel, Teddington, Britain - November 27, 2020 England's Ellis Genge during training in foggy conditions Matthew Childs/Pool via REUTERS

Rugby Union - Autumn Nations Cup - England Training - The Lensbury Hotel, Teddington, Britain - November 27, 2020 England's Mako Vunipola and Joe Launchbury during training in foggy conditions Matthew Childs/Pool via REUTERS

Rugby Union - Autumn Nations Cup - England Training - The Lensbury Hotel, Teddington, Britain - November 27, 2020 England's Joe Launchbury during training in foggy conditions Matthew Childs/Pool via REUTERS

Rugby Union - Autumn Nations Cup - England Training - The Lensbury Hotel, Teddington, Britain - November 27, 2020 General view during training in foggy conditions Matthew Childs/Pool via REUTERS

Rugby Union - Autumn Nations Cup - England Training - The Lensbury Hotel, Teddington, Britain - November 27, 2020 England's Elliot Daly and Owen Farrell during training Matthew Childs/Pool via REUTERS

Rugby Union - Autumn Nations Cup - England Training - The Lensbury Hotel, Teddington, Britain - November 27, 2020 England head coach Eddie Jones and England's Billy Vunipola during training Matthew Childs/Pool via REUTERS

Rugby Union - Autumn Nations Cup - England Training - The Lensbury Hotel, Teddington, Britain - November 27, 2020 England's Maro Itoje during training Matthew Childs/Pool via REUTERS

Rugby Union - Autumn Nations Cup - England Training - The Lensbury Hotel, Teddington, Britain - November 27, 2020 England's Elliot Daly during training Matthew Childs/Pool via REUTERS

Fitness coach Adedamola Ladejobi trains at home while she is recording her exercise sessions in Lagos, Nigeria November 10, 2020. Picture taken November 10, 2020. REUTERS/Seun Sanni

Fitness coach Adedamola Ladejobi trains at home while she is recording her exercise sessions in Lagos, Nigeria November 10, 2020. Picture taken November 10, 2020. REUTERS/Seun Sanni

Rugby Union - Autumn Nations Cup - England Training - The Lensbury Hotel, Teddington, Britain - November 27, 2020 General view during training in foggy conditions Matthew Childs/Pool via REUTERS

Rugby Union - Autumn Nations Cup - England Training - The Lensbury Hotel, Teddington, Britain - November 27, 2020 General view during training in foggy conditions Matthew Childs/Pool via REUTERS

People wearing protective masks wait for a train at a railway station, amid the spread of the coronavirus disease (COVID-19), in Mumbai, India, November 27, 2020. REUTERS/Francis Mascarenhas

Rugby Union - Autumn Nations Cup - England Training - The Lensbury Hotel, Teddington, Britain - November 27, 2020 General view during training in foggy conditions Matthew Childs/Pool via REUTERS

Rugby Union - Autumn Nations Cup - England Training - The Lensbury Hotel, Teddington, Britain - November 27, 2020 England head coach Eddie Jones during training in foggy conditions Matthew Childs/Pool via REUTERS

A woman wearing a protective mask waits for a train at a railway station, amid the spread of the coronavirus disease (COVID-19), in Mumbai, India, November 27, 2020. REUTERS/Francis Mascarenhas

Rugby Union - Autumn Nations Cup - England Training - The Lensbury Hotel, Teddington, Britain - November 27, 2020 England's Owen Farrell during training in foggy conditions Matthew Childs/Pool via REUTERS

Rugby Union - Autumn Nations Cup - England Training - The Lensbury Hotel, Teddington, Britain - November 27, 2020 England's Owen Farrell during training in foggy conditions Matthew Childs/Pool via REUTERS

Rugby Union - Autumn Nations Cup - England Training - The Lensbury Hotel, Teddington, Britain - November 27, 2020 England's Billy Vunipola during training Matthew Childs/Pool via REUTERS

Rugby Union - Autumn Nations Cup - England Training - The Lensbury Hotel, Teddington, Britain - November 27, 2020 England head coach Eddie Jones during training Matthew Childs/Pool via REUTERS

Rugby Union - Autumn Nations Cup - England Training - The Lensbury Hotel, Teddington, Britain - November 27, 2020 England head coach Eddie Jones during training Matthew Childs/Pool via REUTERS

Rugby Union - Autumn Nations Cup - England Training - The Lensbury Hotel, Teddington, Britain - November 27, 2020 England head coach Eddie Jones during training Matthew Childs/Pool via REUTERS

People wait for a train at Grand Central Terminal the day before Thanksgiving during the coronavirus disease (COVID-19) pandemic in the Manhattan borough of New York City, New York, U.S., November 25, 2020. REUTERS/Carlo Allegri

A man waits for a train at Pennsylvania Station the day before Thanksgiving during the coronavirus disease (COVID-19) pandemic in the Manhattan area of New York City, New York, U.S., November 25, 2020. REUTERS/Carlo Allegri REFILE - CORRECTING LOCATION

People pose for a photo as they wait for a train at Pennsylvania Station the day before Thanksgiving during the coronavirus disease (COVID-19) pandemic in the Manhattan area of New York City, New York, U.S., November 25, 2020. REUTERS/Carlo Allegri REFILE - CORRECTING LOCATION

People wait for a train at Pennsylvania Station the day before Thanksgiving during the coronavirus disease (COVID-19) pandemic in the Manhattan area of New York City, New York, U.S., November 25, 2020. REUTERS/Carlo Allegri REFILE - CORRECTING LOCATION

Rugby Union - Autumn Nations Cup - England Training - The Lensbury Hotel, Teddington, Britain - November 25, 2020 England's Max Malins during training Andrew Matthews/Pool via REUTERS

Rugby Union - Autumn Nations Cup - England Training - The Lensbury Hotel, Teddington, Britain - November 25, 2020 England's Dan Robson during training Andrew Matthews/Pool via REUTERS

A woman disembarks a train after arriving at Union Station ahead of the Thanksgiving holiday in Washington, U.S. November 25, 2020. REUTERS/Hannah McKay

Rugby Union - Autumn Nations Cup - England Training - The Lensbury Hotel, Teddington, Britain - November 25, 2020 England's head coach Eddie Jones with the players during training Andrew Matthews/Pool via REUTERS

Rugby Union - Autumn Nations Cup - England Training - The Lensbury Hotel, Teddington, Britain - November 25, 2020 England's Mako Vunipola during training Andrew Matthews/Pool via REUTERS

Rugby Union - Autumn Nations Cup - England Training - The Lensbury Hotel, Teddington, Britain - November 25, 2020 England's Jonathan Joseph during training Andrew Matthews/Pool via REUTERS

Rugby Union - Autumn Nations Cup - England Training - The Lensbury Hotel, Teddington, Britain - November 25, 2020 England's Jonny May during training Andrew Matthews/Pool via REUTERS

Rugby Union - Autumn Nations Cup - England Training - The Lensbury Hotel, Teddington, Britain - November 25, 2020 England's head coach Eddie Jones during training Andrew Matthews/Pool via REUTERS

Rugby Union - Autumn Nations Cup - England Training - The Lensbury Hotel, Teddington, Britain - November 25, 2020 England's Jonny May during training Andrew Matthews/Pool via REUTERS

Rugby Union - Autumn Nations Cup - England Training - The Lensbury Hotel, Teddington, Britain - November 25, 2020 England's Anthony Watson and Dan Robson during training Andrew Matthews/Pool via REUTERS