Medical staff at Strasbourg's university hospital is seen while attending a training for new staff to reinforce ICU regular crews who face a second wave of patients suffering from the coronavirus disease (COVID-19) in Strasbourg, France, November 13, 2020. REUTERS/Christian Hartmann

A medical staff member emerges from a COVID-19 mobile tent testing area in front of a pharmacy near Gare de Lyon train station in Paris, France, November 5, 2020. REUTERS/Benoit Tessier

A general view of a demonstration showcasing how a dog could learn to detect the coronavirus disease (COVID-19) during a visit by Camilla, Duchess of Cornwall, at a charity's training centre in Milton Keynes, Britain September 9, 2020. Chris Jackson/Pool via REUTERS

A close up of the dog tag wore by Storm, a Labrador Cross Golden Retriever, awaiting the arrival of Camilla, Duchess of Cornwall, to a charity's training centre where trials are currently underway to determine whether dogs can act as a diagnostic tool detecting the coronavirus disease (COVID-19) in Milton Keynes, Britain September 9, 2020. Chris Jackson/Pool via REUTERS

Storm, a Labrador Cross Golden Retriever, awaits the arrival of Camilla, Duchess of Cornwall, to a charity's training centre where trials are currently underway to determine whether dogs can act as a diagnostic tool detecting the coronavirus disease (COVID-19) in Milton Keynes, Britain September 9, 2020. Chris Jackson/Pool via REUTERS

Storm, a Labrador Cross Golden Retriever, awaits the arrival of Camilla, Duchess of Cornwall, to a charity's training centre where trials are currently underway to determine whether dogs can act as a diagnostic tool detecting the coronavirus disease (COVID-19) in Milton Keynes, Britain September 9, 2020. Chris Jackson/Pool via REUTERS

Storm, a Labrador Cross Golden Retriever, awaits the arrival of Camilla, Duchess of Cornwall, to a charity's training centre where trials are currently underway to determine whether dogs can act as a diagnostic tool detecting the coronavirus disease (COVID-19) in Milton Keynes, Britain September 9, 2020. Chris Jackson/Pool via REUTERS

A general view of a demonstration showcasing how a dog could learn to detect the coronavirus disease (COVID-19) during a visit by Camilla, Duchess of Cornwall, at a charity's training centre in Milton Keynes, Britain September 9, 2020. Chris Jackson/Pool via REUTERS

A general view of a demonstration showcasing how a dog could learn to detect the coronavirus disease (COVID-19) during a visit by Camilla, Duchess of Cornwall, at a charity's training centre in Milton Keynes, Britain September 9, 2020. Chris Jackson/Pool via REUTERS

A general view of a demonstration showcasing how a dog could learn to detect the coronavirus disease (COVID-19) during a visit by Camilla, Duchess of Cornwall, at a charity's training centre in Milton Keynes, Britain September 9, 2020. Chris Jackson/Pool via REUTERS

A general view of a demonstration showcasing how a dog could learn to detect the coronavirus disease (COVID-19) during a visit by Camilla, Duchess of Cornwall, at a charity's training centre in Milton Keynes, Britain September 9, 2020. Chris Jackson/Pool via REUTERS

Britain's Camilla, Duchess of Cornwall visits a charity's training centre where trials are currently underway to determine whether dogs can act as a diagnostic tool detecting the coronavirus disease (COVID-19) in Milton Keynes, Britain September 9, 2020. Chris Jackson/Pool via REUTERS

Britain's Camilla, Duchess of Cornwall visits a charity's training centre where trials are currently underway to determine whether dogs can act as a diagnostic tool detecting the coronavirus disease (COVID-19) in Milton Keynes, Britain September 9, 2020. Chris Jackson/Pool via REUTERS

Britain's Camilla, Duchess of Cornwall visits a charity's training centre where trials are currently underway to determine whether dogs can act as a diagnostic tool detecting the coronavirus disease (COVID-19) in Milton Keynes, Britain September 9, 2020. Chris Jackson/Pool via REUTERS

Britain's Camilla, Duchess of Cornwall visits a charity's training centre where trials are currently underway to determine whether dogs can act as a diagnostic tool detecting the coronavirus disease (COVID-19) in Milton Keynes, Britain September 9, 2020. Chris Jackson/Pool via REUTERS

Britain's Camilla, Duchess of Cornwall visits a charity's training centre where trials are currently underway to determine whether dogs can act as a diagnostic tool detecting the coronavirus disease (COVID-19) in Milton Keynes, Britain September 9, 2020. Chris Jackson/Pool via REUTERS

Britain's Camilla, Duchess of Cornwall visits a charity's training centre where trials are currently underway to determine whether dogs can act as a diagnostic tool detecting the coronavirus disease (COVID-19) in Milton Keynes, Britain September 9, 2020. Chris Jackson/Pool via REUTERS

Britain's Camilla, Duchess of Cornwall visits a charity's training centre where trials are currently underway to determine whether dogs can act as a diagnostic tool detecting the coronavirus disease (COVID-19) in Milton Keynes, Britain September 9, 2020. Chris Jackson/Pool via REUTERS

Britain's Camilla, Duchess of Cornwall visits a charity's training centre where trials are currently underway to determine whether dogs can act as a diagnostic tool detecting the coronavirus disease (COVID-19) in Milton Keynes, Britain September 9, 2020. Chris Jackson/Pool via REUTERS

Britain's Camilla, Duchess of Cornwall visits a charity's training centre where trials are currently underway to determine whether dogs can act as a diagnostic tool detecting the coronavirus disease (COVID-19) in Milton Keynes, Britain September 9, 2020. Chris Jackson/Pool via REUTERS

Britain's Camilla, Duchess of Cornwall visits a charity's training centre where trials are currently underway to determine whether dogs can act as a diagnostic tool detecting the coronavirus disease (COVID-19) in Milton Keynes, Britain September 9, 2020. Chris Jackson/Pool via REUTERS

Britain's Camilla, Duchess of Cornwall visits a charity's training centre where trials are currently underway to determine whether dogs can act as a diagnostic tool detecting the coronavirus disease (COVID-19) in Milton Keynes, Britain September 9, 2020. Chris Jackson/Pool via REUTERS

Britain's Camilla, Duchess of Cornwall visits a charity's training centre where trials are currently underway to determine whether dogs can act as a diagnostic tool detecting the coronavirus disease (COVID-19) in Milton Keynes, Britain September 9, 2020. Chris Jackson/Pool via REUTERS

Britain's Camilla, Duchess of Cornwall visits a charity's training centre where trials are currently underway to determine whether dogs can act as a diagnostic tool detecting the coronavirus disease (COVID-19) in Milton Keynes, Britain September 9, 2020. Chris Jackson/Pool via REUTERS

Britain's Camilla, Duchess of Cornwall wears a face shield during a visit to the charity's training centre where trials are currently underway to determine whether dogs can act as a diagnostic tool detecting the coronavirus disease (COVID-19) in Milton Keynes, Britain September 9, 2020. Chris Jackson/Pool via REUTERS

Britain's Camilla, Duchess of Cornwall wears a face shield during a visit to the charity's training centre where trials are currently underway to determine whether dogs can act as a diagnostic tool detecting the coronavirus disease (COVID-19) in Milton Keynes, Britain September 9, 2020. Chris Jackson/Pool via REUTERS

Britain's Camilla, Duchess of Cornwall wears a face shield during a visit to the charity's training centre where trials are currently underway to determine whether dogs can act as a diagnostic tool detecting the coronavirus disease (COVID-19) in Milton Keynes, Britain September 9, 2020. Chris Jackson/Pool via REUTERS

Britain's Camilla, Duchess of Cornwall wears a face shield during a visit to the charity's training centre where trials are currently underway to determine whether dogs can act as a diagnostic tool detecting the coronavirus disease (COVID-19) in Milton Keynes, Britain September 9, 2020. Chris Jackson/Pool via REUTERS

Britain's Camilla, Duchess of Cornwall wears a face shield during a visit to the charity's training centre where trials are currently underway to determine whether dogs can act as a diagnostic tool detecting the coronavirus disease (COVID-19) in Milton Keynes, Britain September 9, 2020. Chris Jackson/Pool via REUTERS

Britain's Camilla, Duchess of Cornwall wears a face shield during a visit to the charity's training centre where trials are currently underway to determine whether dogs can act as a diagnostic tool detecting the coronavirus disease (COVID-19) in Milton Keynes, Britain September 9, 2020. Chris Jackson/Pool via REUTERS

Britain's Camilla, Duchess of Cornwall wears a face shield during a visit to the charity's training centre where trials are currently underway to determine whether dogs can act as a diagnostic tool detecting the coronavirus disease (COVID-19) in Milton Keynes, Britain September 9, 2020. Chris Jackson/Pool via REUTERS

Britain's Camilla, Duchess of Cornwall wears a face shield during a visit to the charity's training centre where trials are currently underway to determine whether dogs can act as a diagnostic tool detecting the coronavirus disease (COVID-19) in Milton Keynes, Britain September 9, 2020. Chris Jackson/Pool via REUTERS

Britain's Camilla, Duchess of Cornwall wears a face shield during a visit to the charity's training centre where trials are currently underway to determine whether dogs can act as a diagnostic tool detecting the coronavirus disease (COVID-19) in Milton Keynes, Britain September 9, 2020. Chris Jackson/Pool via REUTERS

Britain's Camilla, Duchess of Cornwall wears a face shield during a visit to the charity's training centre where trials are currently underway to determine whether dogs can act as a diagnostic tool detecting the coronavirus disease (COVID-19) in Milton Keynes, Britain September 9, 2020. Chris Jackson/Pool via REUTERS

Britain's Camilla, Duchess of Cornwall wears a face shield during a visit to the charity's training centre where trials are currently underway to determine whether dogs can act as a diagnostic tool detecting the coronavirus disease (COVID-19) in Milton Keynes, Britain September 9, 2020. Chris Jackson/Pool via REUTERS

Britain's Camilla, Duchess of Cornwall wears a face shield during a visit to the charity's training centre where trials are currently underway to determine whether dogs can act as a diagnostic tool detecting the coronavirus disease (COVID-19) in Milton Keynes, Britain September 9, 2020. Chris Jackson/Pool via REUTERS

Britain's Camilla, Duchess of Cornwall wears a face shield during a visit to the charity's training centre where trials are currently underway to determine whether dogs can act as a diagnostic tool detecting the coronavirus disease (COVID-19) in Milton Keynes, Britain September 9, 2020. Chris Jackson/Pool via REUTERS

Britain's Camilla, Duchess of Cornwall wears a face shield during a visit to the charity's training centre where trials are currently underway to determine whether dogs can act as a diagnostic tool detecting the coronavirus disease (COVID-19) in Milton Keynes, Britain September 9, 2020. Chris Jackson/Pool via REUTERS

Britain's Camilla, Duchess of Cornwall wears a face shield during a visit to the charity's training centre where trials are currently underway to determine whether dogs can act as a diagnostic tool detecting the coronavirus disease (COVID-19) in Milton Keynes, Britain September 9, 2020. Chris Jackson/Pool via REUTERS

Britain's Camilla, Duchess of Cornwall wears a face shield during a visit to the charity's training centre where trials are currently underway to determine whether dogs can act as a diagnostic tool detecting the coronavirus disease (COVID-19) in Milton Keynes, Britain September 9, 2020. Chris Jackson/Pool via REUTERS

Britain's Camilla, Duchess of Cornwall wears a face shield during a visit to the charity's training centre where trials are currently underway to determine whether dogs can act as a diagnostic tool detecting the coronavirus disease (COVID-19) in Milton Keynes, Britain September 9, 2020. Chris Jackson/Pool via REUTERS

Britain's Camilla, Duchess of Cornwall wears a face shield during a visit to the charity's training centre where trials are currently underway to determine whether dogs can act as a diagnostic tool detecting the coronavirus disease (COVID-19) in Milton Keynes, Britain September 9, 2020. Chris Jackson/Pool via REUTERS

Seibu Hospital's medical staff take part in a PCI (percutaneous coronary intervention) simulation training at the hospital in Yokohama, Japan, June 18, 2020. Picture taken on June 18, 2020. REUTERS/Kim Kyung-Hoon

Seibu Hospital's medical staff take part in a PCI (percutaneous coronary intervention) simulation training at the hospital in Yokohama, Japan, June 18, 2020. Picture taken on June 18, 2020. REUTERS/Kim Kyung-Hoon

Director of the Crown Prince Center For Training And Medical Research, Brig. Dr. Khalid A. Ghaffar assists doctors during their virtual operation training during a media visit to the training center, in Riffa, Bahrain, June 18, 2020, REUTERS/Hamad I Mohammed

Director of the Crown Prince Center For Training And Medical Research, Brig. Dr. Khalid A. Ghaffar explains emergency response team's demonstration with medical dummy during a media visit to the training center, in Riffa, Bahrain, June 18, 2020, REUTERS/Hamad I Mohammed

Trainee doctors do a demonstration with medical dummy during a media visit to the Crown Prince Center For Training And Medical Research, in Riffa, Bahrain, June 18, 2020, REUTERS/Hamad I Mohammed.

Doctors walk out of a newly opened Crown Prince Center For Training And Medical Research, in Riffa, Bahrain, June 18, 2020, REUTERS/Hamad I Mohammed

A member of the medical staff waves to patients after their exercise at a training center, which has been converted into a quarantine house, in Tangerang, on the outskirts of Jakarta, Indonesia, amid the coronavirus disease (COVID-19) outbreak, May 28, 2020. REUTERS/WIlly Kurniawan

Soccer Football - Gremio players and staff arrive at CT Luiz Carvalho for COVID-19 tests - CT Luiz Carvalho, Porto Alegre, Brazil - May 6, 2020 Gremio's Paulo Miranda wearing a protective face mask arrives at the training center for general medical test, tomorrow training will resume with restrictions due to the spread of the coronavirus disease (COVID-19) REUTERS/Diego Vara

Soccer Football - Gremio players and staff arrive at CT Luiz Carvalho for COVID-19 tests - CT Luiz Carvalho, Porto Alegre, Brazil - May 6, 2020 Gremio's Pedro Geromel wearing a protective face mask at the training center after taking a general medical test, tomorrow training will resume with restrictions due to the spread of the coronavirus disease (COVID-19) REUTERS/Diego Vara

Soccer Football - Gremio players and staff arrive at CT Luiz Carvalho for COVID-19 tests - CT Luiz Carvalho, Porto Alegre, Brazil - May 6, 2020 Gremio's Pedro Geromel wearing a protective face mask arrives at the training center for general medical test, tomorrow training will resume with restrictions due to the spread of the coronavirus disease (COVID-19) REUTERS/Diego Vara

Soccer Football - Gremio players and staff arrive at CT Luiz Carvalho for COVID-19 tests - CT Luiz Carvalho, Porto Alegre, Brazil - May 6, 2020 Gremio's Bruno Cortez wearing a protective face mask arrives at the training center for general medical test, tomorrow training will resume with restrictions due to the spread of the coronavirus disease (COVID-19) REUTERS/Diego Vara

Soccer Football - Gremio players and staff arrive at CT Luiz Carvalho for COVID-19 tests - CT Luiz Carvalho, Porto Alegre, Brazil - May 6, 2020 Gremio's Walter Kannemann wearing a protective face mask arrives at the training center for general medical test, tomorrow training will resume with restrictions due to the spread of the coronavirus disease (COVID-19) REUTERS/Diego Vara

Soccer Football - Gremio players and staff arrive at CT Luiz Carvalho for COVID-19 tests - CT Luiz Carvalho, Porto Alegre, Brazil - May 6, 2020 Gremio's Walter Kannemann wearing a protective face mask arrives at the training center for general medical test, tomorrow training will resume with restrictions due to the spread of the coronavirus disease (COVID-19) REUTERS/Diego Vara

Soccer Football - Gremio players and staff arrive at CT Luiz Carvalho for COVID-19 tests - CT Luiz Carvalho, Porto Alegre, Brazil - May 6, 2020 Gremio's Paulo Victor wearing a protective face mask at the training center for general medical test, tomorrow training will resume with restrictions due to the spread of the coronavirus disease (COVID-19) REUTERS/Diego Vara

Soccer Football - Gremio players and staff arrive at CT Luiz Carvalho for COVID-19 tests - CT Luiz Carvalho, Porto Alegre, Brazil - May 6, 2020 Gremio's Guilherme Guedes wearing a protective face mask at the training center for general medical test, tomorrow training will resume with restrictions due to the spread of the coronavirus disease (COVID-19) REUTERS/Diego Vara

Soccer Football - AC Milan players and staff arrive at Hospital Clinica La Madonnina for general medical tests - Hospital Clinica La Madonnina, Milan, Italy - May 6, 2020 AC Milan's Hakan Calhanoglu wearing a protective face mask after leaving Hospital Clinica La Madonnina for general medical tests after Italy allowed Serie A teams to start training individually as the country begins a staged end to a nationwide lockdown due to a spread of the coronavirus disease (COVID-19) REUTERS/Daniele Mascolo

Soccer Football - AC Milan players and staff arrive at Hospital Clinica La Madonnina for general medical tests - Hospital Clinica La Madonnina, Milan, Italy - May 6, 2020 AC Milan's Hakan Calhanoglu is seen reflected in his car window wearing a protective face mask after leaving Hospital Clinica La Madonnina for general medical tests after Italy allowed Serie A teams to start training individually as the country begins a staged end to a nationwide lockdown due to a spread of the coronavirus disease (COVID-19) REUTERS/Daniele Mascolo

Soccer Football - AC Milan players and staff arrive at Hospital Clinica La Madonnina for general medical tests - Hospital Clinica La Madonnina, Milan, Italy - May 6, 2020 AC Milan's Simon Kjaer wearing a protective face mask as he arrives at Hospital Clinica La Madonnina for general medical tests after Italy allowed Serie A teams to start training individually as the country begins a staged end to a nationwide lockdown due to a spread of the coronavirus disease (COVID-19) REUTERS/Daniele Mascolo