Britain's Prime Minister Boris Johnson speaks with staff as he is shown an MRI scanner at Leeds General Infirmary, in Leeds, Britain October 2, 2021. Christopher Furlong/Pool via REUTERS 

Britain's Prime Minister Boris Johnson goes to sanitise his hands as he is shown an MRI scanner at Leeds General Infirmary, in Leeds, Britain October 2, 2021. Christopher Furlong/Pool via REUTERS 

Britain's Prime Minister Boris Johnson and Health Secretary Sajid Javid visit Leeds General Infirmary, in Leeds, Britain October 2, 2021. Christopher Furlong/Pool via REUTERS 

Britain's Prime Minister Boris Johnson and Health Secretary Sajid Javid visit the construction site of the new Children's Hospital at Leeds General Infirmary, in Leeds, Britain October 2, 2021. Christopher Furlong/Pool via REUTERS 

Britain's Prime Minister Boris Johnson and Health Secretary Sajid Javid visit the construction site of the new Children's Hospital at Leeds General Infirmary, in Leeds, Britain October 2, 2021. Christopher Furlong/Pool via REUTERS 

Britain's Prime Minister Boris Johnson greets a member of staff with a fist bump during a visit to the construction site of the new Children's Hospital at Leeds General Infirmary, in Leeds, Britain October 2, 2021. Christopher Furlong/Pool via REUTERS 

Health Secretary Sajid Javid looks on during a visit at Leeds General Infirmary, in Leeds, Britain October 2, 2021. Christopher Furlong/Pool via REUTERS 

Health Secretary Sajid Javid looks on during a visit at Leeds General Infirmary, in Leeds, Britain October 2, 2021. Christopher Furlong/Pool via REUTERS 

Britain's Prime Minister Boris Johnson and Health Secretary Sajid Javid visit the construction site of the new Children's Hospital at Leeds General Infirmary, in Leeds, Britain October 2, 2021. Christopher Furlong/Pool via REUTERS 

Britain's Prime Minister Boris Johnson visits the construction site of the new Children's Hospital at Leeds General Infirmary, in Leeds, Britain October 2, 2021. Christopher Furlong/Pool via REUTERS 

Britain's Prime Minister Boris Johnson looks on during a visit at Leeds General Infirmary, in Leeds, Britain October 2, 2021. Christopher Furlong/Pool via REUTERS 

Britain's Prime Minister Boris Johnson looks on during a visit at Leeds General Infirmary, in Leeds, Britain October 2, 2021. Christopher Furlong/Pool via REUTERS 

Britain's Prime Minister Boris Johnson looks on during a visit at Leeds General Infirmary, in Leeds, Britain October 2, 2021. Christopher Furlong/Pool via REUTERS 

Britain's Health Secretary Sajid Javid visits the construction site of the new Children?s Hospital at Leeds General Infirmary, in Leeds, Britain October 2, 2021. Christopher Furlong/Pool via REUTERS 

Britain's Prime Minister Boris Johnson visits the construction site of the new Children's Hospital at Leeds General Infirmary, in Leeds, Britain October 2, 2021. Christopher Furlong/Pool via REUTERS 

Britain's Prime Minister Boris Johnson and Health Secretary Sajid Javid visit the construction site of the new Children's Hospital at Leeds General Infirmary, in Leeds, Britain October 2, 2021. Christopher Furlong/Pool via REUTERS 

Prime Minister Boris Johnson and Health Secretary Sajid Javid speak with patient Arthur McCune at Leeds General Infirmary, in Leeds, Britain October 2, 2021. Christopher Furlong/Pool via REUTERS 

Britain's Prime Minister Boris Johnson and Health Secretary Sajid Javid visit the construction site of the new Children's Hospital at Leeds General Infirmary, in Leeds, Britain October 2, 2021. Christopher Furlong/Pool via REUTERS 

Britain's Prime Minister Boris Johnson and Health Secretary Sajid Javid visit the construction site of the new Children's Hospital at Leeds General Infirmary, in Leeds, Britain October 2, 2021. Christopher Furlong/Pool via REUTERS 

Britain's Prime Minister Boris Johnson and Health Secretary Sajid Javid visit the construction site of the new Children's Hospital at Leeds General Infirmary, in Leeds, Britain October 2, 2021. Christopher Furlong/Pool via REUTERS 

Musician Cristiano de Andrade plays his violin for health workers at a COVID-19 infirmary at Semiu hospital, as part of a project which brings music to healthcare workers, patients and relatives, as the spread of coronavirus disease (COVID-19) continues, in Rio de Janeiro, Brazil, March 24, 2021. REUTERS/Ricardo Moraes 

Musician Cristiano de Andrade plays his violin for health workers at a COVID-19 infirmary at Semiu hospital, as part of a project which brings music to healthcare workers, patients and relatives, as the spread of coronavirus disease (COVID-19) continues, in Rio de Janeiro, Brazil, March 24, 2021. REUTERS/Ricardo Moraes 

Asylum seekers sit at the infirmary inside a migrant encampment in Matamoros, Mexico February 18, 2021. Picture taken February 18, 2021. REUTERS/Daniel Becerril 

A nurse prepares to administer the Pfizer/BioNTech COVID-19 vaccine jab at the Royal Victoria Infirmary, on the first day of the largest immunisation programme in the British history, in Newcastle, Britain December 8, 2020. Owen Humphreys/Pool via REUTERS 

A needle next to a phial of the Pfizer/BioNTech COVID-19 vaccine jab is seen at the Royal Victoria Infirmary, on the first day of the largest immunisation programme in the British history, in Newcastle, Britain December 8, 2020. Owen Humphreys/Pool via REUTERS 

Dr Hari Shukla and his wife Ranju Shukla are seen ahead of receiving the first of two Pfizer/BioNTech COVID-19 vaccine jabs, administered by retired nurse Suzanne Medows, at the Royal Victoria Infirmary, on the first day of the largest immunisation programme in the British history, in Newcastle, Britain December 8, 2020. Owen Humphreys/Pool via REUTERS 

Race relations campaigner Dr Hari Shukla, 87, receives the first of two Pfizer/BioNTech COVID-19 vaccine jabs, administered by retired nurse Suzanne Medows, at the Royal Victoria Infirmary, on the first day of the largest immunisation programme in the British history, in Newcastle, Britain December 8, 2020. Owen Humphreys/Pool via REUTERS 

Retired nurse Suzanne Medows speaks to race relations campaigner Dr Hari Shukla, 87, and his wife Ranju before he receives the first of two Pfizer/BioNTech COVID-19 vaccine jabs, administered by retired nurse Suzanne Medows, at the Royal Victoria Infirmary, on the first day of the largest immunisation programme in the British history, in Newcastle, Britain December 8, 2020. Owen Humphreys/Pool via REUTERS 

Race relations campaigner Dr Hari Shukla, 87, receives the first of two Pfizer/BioNTech COVID-19 vaccine jabs, administered by retired nurse Suzanne Medows, at the Royal Victoria Infirmary, on the first day of the largest immunisation programme in the British history, in Newcastle, Britain December 8, 2020. Owen Humphreys/Pool via REUTERS 

Race relations campaigner Dr Hari Shukla, 87, receives the first of two Pfizer/BioNTech COVID-19 vaccine jabs, administered by retired nurse Suzanne Medows, at the Royal Victoria Infirmary, on the first day of the largest immunisation programme in the British history, in Newcastle, Britain December 8, 2020. Owen Humphreys/Pool via REUTERS 

Retired nurse Suzanne Medows speaks to race relations campaigner Dr Hari Shukla, 87, and his wife Ranju before he receives the first of two Pfizer/BioNTech COVID-19 vaccine jabs, at the Royal Victoria Infirmary, on the first day of the largest immunisation programme in the British history, in Newcastle, Britain December 8, 2020. Owen Humphreys/Pool via REUTERS 

Ranju Shukla, accompanied by her husband Dr Hari Shukla, receives the first of two Pfizer/BioNTech COVID-19 vaccine jabs, administered by retired nurse Suzanne Medows, at the Royal Victoria Infirmary, on the first day of the largest immunisation programme in the British history, in Newcastle, Britain December 8, 2020. Owen Humphreys/Pool via REUTERS 

Ranju Shukla, accompanied by her husband Dr Hari Shukla, receives the first of two Pfizer/BioNTech COVID-19 vaccine jabs, administered by retired nurse Suzanne Medows, at the Royal Victoria Infirmary, on the first day of the largest immunisation programme in the British history, in Newcastle, Britain December 8, 2020. Owen Humphreys/Pool via REUTERS 

A needle is filled from a phial of Pfizer/BioNTech COVID-19 vaccine at the Royal Victoria Infirmary, on the first day of the largest immunisation programme in the British history, in Newcastle, Britain December 8, 2020. Owen Humphreys/Pool via REUTERS 

A needle is filled from a phial of Pfizer/BioNTech COVID-19 vaccine at the Royal Victoria Infirmary, on the first day of the largest immunisation programme in the British history, in Newcastle, Britain December 8, 2020. Owen Humphreys/Pool via REUTERS 

A needle is filled from a phial of Pfizer/BioNTech COVID-19 vaccine at the Royal Victoria Infirmary, on the first day of the largest immunisation programme in the British history, in Newcastle, Britain December 8, 2020. Owen Humphreys/Pool via REUTERS 

A needle is filled from a phial of Pfizer/BioNTech COVID-19 vaccine at the Royal Victoria Infirmary, on the first day of the largest immunisation programme in the British history, in Newcastle, Britain December 8, 2020. Owen Humphreys/Pool via REUTERS 

Race relations campaigner Dr Hari Shukla, 87, and his wife Ranju read vaccination information leaflets before receiving the first of two Pfizer/BioNTech COVID-19 vaccine jabs, administered by retired nurse Suzanne Medows, at the Royal Victoria Infirmary, on the first day of the largest immunisation programme in the British history, in Newcastle, Britain December 8, 2020. Owen Humphreys/Pool via REUTERS 

A needle is filled from a phial of Pfizer/BioNTech COVID-19 vaccine at the Royal Victoria Infirmary, on the first day of the largest immunisation programme in the British history, in Newcastle, Britain December 8, 2020. Owen Humphreys/Pool via REUTERS 

Retired nurse Suzanne Medows speaks to race relations campaigner Dr Hari Shukla, 87, and his wife Ranju before he receives the first of two Pfizer/BioNTech COVID-19 vaccine jabs at the Royal Victoria Infirmary, on the first day of the largest immunisation programme in the British history, in Newcastle, Britain December 8, 2020. Owen Humphreys/Pool via REUTERS 

Ranju Shukla, accompanied by her husband Dr Hari Shukla, receives the first of two Pfizer/BioNTech COVID-19 vaccine jabs, administered by retired nurse Suzanne Medows, at the Royal Victoria Infirmary, on the first day of the largest immunisation programme in the British history, in Newcastle, Britain December 8, 2020. Owen Humphreys/Pool via REUTERS 

Race relations campaigner Dr Hari Shukla, 87, receives the first of two Pfizer/BioNTech COVID-19 vaccine jabs, administered by retired nurse Suzanne Medows, at the Royal Victoria Infirmary, on the first day of the largest immunisation programme in the British history, in Newcastle, Britain December 8, 2020. Owen Humphreys/Pool via REUTERS 

A needle is filled from a phial of Pfizer/BioNTech COVID-19 vaccine, at the Royal Victoria Infirmary, on the first day of the largest immunisation programme in the British history, in Newcastle, Britain December 8, 2020. Owen Humphreys/Pool via REUTERS 

Dr Hari Shukla receives the first of two Pfizer/BioNTech COVID-19 vaccine jabs, administered by retired nurse Suzanne Medows, at the Royal Victoria Infirmary, on the first day of the largest immunisation programme in the British history, in Newcastle, Britain December 8, 2020. Owen Humphreys/Pool via REUTERS 

A camera of a thermal imaging system is seen inside a public hospital to measure temperature and identify people potentially infected with the coronavirus disease (COVID-19) in Valparaiso, Chile April 23, 2020. REUTERS/Rodrigo Garrido 

A camera of a thermal imaging system is seen inside a public hospital to measure temperature and identify people potentially infected with the coronavirus disease (COVID-19) in Valparaiso, Chile April 23, 2020. REUTERS/Rodrigo Garrido 

A patient undergoes dialysis treatment at a dialysis centre, amidst the coronavirus disease (COVID-19) outbreak, in Guayaquil, Ecuador April 18, 2020. Picture taken April 18, 2020. REUTERS/Santiago Arcos 

A wheelchair-bound patient is helped by a nurse before undergoing dialysis treatment at a dialysis centre, amidst the coronavirus disease (COVID-19) outbreak, in Guayaquil, Ecuador April 18, 2020. Picture taken April 18, 2020. REUTERS/Santiago Arcos 

Empty beds are seen, during the inauguration of a 200 beds temporary health facility to treat the coronavirus disease (COVID-19) in Kabul, Afghanistan April 18, 2020. REUTERS/Omar Sobhani 

Uninstalled sinks are seen outside a pavilion at the Corferias convention centre, where a temporary hospital for low-risk patients is being built, amid the coronavirus disease (COVID-19) outbreak in Bogota, Colombia April 15, 2020. REUTERS/Luisa Gonzalez 

Oxygen cylinders are pictured at an out-of-order oxygen plant of a hospital allocated for the coronavirus patients in preparation for any possible spread of the coronavirus disease (COVID-19), in Sanaa, Yemen April 8, 2020. Picture taken April 8, 2020. REUTERS/Khaled Abdullah 

A medical specialist wearing protective gear walks out of a hospital for patients infected with the coronavirus disease (COVID-19) on the outskirts of Moscow, Russia April 14, 2020. REUTERS/Tatyana Makeyeva 

A medical specialist wearing protective gear walks in a hospital for patients infected with the coronavirus disease (COVID-19) on the outskirts of Moscow, Russia April 12, 2020. REUTERS/Tatyana Makeyeva 

A face mask is seen under a bed inside a convention center that was used as a makeshift hospital to treat patients with the coronavirus disease (COVID-19), in Wuhan, Hubei province, China April 9, 2020. REUTERS/Aly Song 

A bouquet is seen inside a convention center that was used as a makeshift hospital to treat patients with the coronavirus disease (COVID-19), in Wuhan, Hubei province, China April 9, 2020. REUTERS/Aly Song 

A desk and a chair are seen inside a convention center that was used as a makeshift hospital to treat patients with the coronavirus disease (COVID-19), in Wuhan, Hubei province, China April 9, 2020. REUTERS/Aly Song 

A portable restroom is pictured outside at a 140-bed COVID-19 assessment and recovery facility for individuals who are not able to recover at home, or are homeless, as efforts continue to slow the spread of coronavirus disease (COVID-19) in Shoreline, Washington, U.S. April 1, 2020. REUTERS/Jason Redmond 

An exam room is pictured at a 140-bed COVID-19 assessment and recovery facility for individuals who are not able to recover at home, or are homeless, as efforts continue to slow the spread of coronavirus disease (COVID-19) in Shoreline, Washington, U.S. April 1, 2020. REUTERS/Jason Redmond 

Camp beds are seen inside an inactive gym, which is now being converted into a provisional confinement facility for people defying quarantine regulations, as the spread of the coronavirus disease (COVID-19) continues in Menden, Germany, March 27, 2020. REUTERS/Leon Kuegeler 

Camp beds are seen inside an inactive gym, which is now being converted into a provisional confinement facility for people defying quarantine regulations, as the spread of the coronavirus disease (COVID-19) continues in Menden, Germany, March 27, 2020. REUTERS/Leon Kuegeler