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 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

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

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

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

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, 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 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

Banners showing support for NHS staff are displayed at Manchester Royal Infirmary, as the spread of the coronavirus disease (COVID-19) continues, in Manchester, Britain, March 23, 2020. REUTERS/Molly Darlington

Britain's Chancellor of the Exchequer Rishi Sunak visits the pathology labs at Leeds General Infirmary, to show how yesterday's budget is supporting those affected by coronavirus (COVID-19), in Leeds, Britain March 12, 2020. Danny Lawson/Pool via REUTERS

Samples are tested for respiratory viruses during a visit by Britain's Chancellor of the Exchequer Rishi Sunak to the pathology labs at Leeds General Infirmary, in Leeds, Britain March 12, 2020. Danny Lawson/Pool via REUTERS

Samples are tested for respiratory viruses during a visit by Britain's Chancellor of the Exchequer Rishi Sunak to the pathology labs at Leeds General Infirmary, in Leeds, Britain March 12, 2020. Danny Lawson/Pool via REUTERS

Britain's Chancellor of the Exchequer Rishi Sunak is shown the testing of samples for respiratory viruses by Dr Antony Hale during a visit to the pathology labs at Leeds General Infirmary, in Leeds, Britain March 12, 2020. Danny Lawson/Pool via REUTERS

Britain's Chancellor of the Exchequer Rishi Sunak visits the pathology labs at Leeds General Infirmary, in Leeds, Britain March 12, 2020. Danny Lawson/Pool via REUTERS

A drop-off point to receive coronavirus samples for testing at the entrance to the pathology laboratories at the Old Medical School during a visit of Britain's Chancellor of the Exchequer Rishi Sunak to the Leeds General Infirmary, in Leeds, Britain March 12, 2020. Danny Lawson/Pool via REUTERS

The entrance to the pathology laboratories, which will receive coronavirus samples for testing, at the Old Medical School during a visit of Britain's Chancellor of the Exchequer Rishi Sunak to the Leeds General Infirmary, in Leeds, Britain March 12, 2020. Danny Lawson/Pool via REUTERS

A drop-off point to receive coronavirus samples for testing, with empty bottles and swab supplies at the entrance to the pathology laboratories at the Old Medical School during a visit of Britain's Chancellor of the Exchequer Rishi Sunak to the Leeds General Infirmary, in Leeds, Britain March 12, 2020. Danny Lawson/Pool via REUTERS

A drop-off point to receive coronavirus samples for testing, with empty bottles and swab supplies at the entrance to the pathology laboratories at the Old Medical School during a visit of Britain's Chancellor of the Exchequer Rishi Sunak to the Leeds General Infirmary, in Leeds, Britain March 12, 2020. Danny Lawson/Pool via REUTERS

Samples are tested for respiratory viruses during a visit of Britain's Chancellor of the Exchequer Rishi Sunak to the pathology labs at Leeds General Infirmary, in Leeds, Britain March 12, 2020. Danny Lawson/Pool via REUTERS

Samples are tested for respiratory viruses during a visit of Britain's Chancellor of the Exchequer Rishi Sunak to the pathology labs at Leeds General Infirmary, in Leeds, Britain March 12, 2020. Danny Lawson/Pool via REUTERS

Samples are tested for respiratory viruses during a visit of Britain's Chancellor of the Exchequer Rishi Sunak to the pathology labs at Leeds General Infirmary, in Leeds, Britain March 12, 2020. Danny Lawson/Pool via REUTERS

Samples are tested for respiratory viruses during a visit of Britain's Chancellor of the Exchequer Rishi Sunak to the pathology labs at Leeds General Infirmary, in Leeds, Britain March 12, 2020. Danny Lawson/Pool via REUTERS

Samples are tested for respiratory viruses during a visit of Britain's Chancellor of the Exchequer Rishi Sunak to the pathology labs at Leeds General Infirmary, in Leeds, Britain March 12, 2020. Danny Lawson/Pool via REUTERS

Samples are tested for respiratory viruses during a visit of Britain's Chancellor of the Exchequer Rishi Sunak to the pathology labs at Leeds General Infirmary, in Leeds, Britain March 12, 2020. Danny Lawson/Pool via REUTERS

Samples are tested for respiratory viruses during a visit of Britain's Chancellor of the Exchequer Rishi Sunak to the pathology labs at Leeds General Infirmary, in Leeds, Britain March 12, 2020. Danny Lawson/Pool via REUTERS

Britain's Chancellor of the Exchequer Rishi Sunak speaks during a visit to the pathology labs at Leeds General Infirmary, in Leeds, Britain March 12, 2020. Danny Lawson/Pool via REUTERS

Britain's Chancellor of the Exchequer Rishi Sunak is shown the testing of samples for respiratory viruses by Dr Antony Hale during a visit to the pathology labs at Leeds General Infirmary, in Leeds, Britain March 12, 2020. Danny Lawson/Pool via REUTERS

Britain's Chancellor of the Exchequer Rishi Sunak is shown the testing of samples for respiratory viruses by Dr Antony Hale during a visit to the pathology labs at Leeds General Infirmary, in Leeds, Britain March 12, 2020. Danny Lawson/Pool via REUTERS

Britain's Chancellor of the Exchequer Rishi Sunak is shown the testing of samples for respiratory viruses by Dr Antony Hale during a visit to the pathology labs at Leeds General Infirmary, in Leeds, Britain March 12, 2020. Danny Lawson/Pool via REUTERS

Britain's Chancellor of the Exchequer Rishi Sunak is shown the testing of samples for respiratory viruses by Dr Antony Hale during a visit to the pathology labs at Leeds General Infirmary, in Leeds, Britain March 12, 2020. Danny Lawson/Pool via REUTERS

Britain's Chancellor of the Exchequer Rishi Sunak speaks during a visit to the pathology labs at Leeds General Infirmary, in Leeds, Britain March 12, 2020. Danny Lawson/Pool via REUTERS

Britain's Chancellor of the Exchequer Rishi Sunak is shown the testing of samples for respiratory viruses by Dr Antony Hale during a visit to the pathology labs at Leeds General Infirmary, in Leeds, Britain March 12, 2020. Danny Lawson/Pool via REUTERS

Britain's Chancellor of the Exchequer Rishi Sunak is shown the testing of samples for respiratory viruses by Dr Antony Hale during a visit to the pathology labs at Leeds General Infirmary, in Leeds, Britain March 12, 2020. Danny Lawson/Pool via REUTERS

Britain's Chancellor of the Exchequer Rishi Sunak is shown the testing of samples for respiratory viruses by Dr Antony Hale during a visit to the pathology labs at Leeds General Infirmary, in Leeds, Britain March 12, 2020. Danny Lawson/Pool via REUTERS

A child from the indigenous Wichi community holds a spoon during a meal at a hospital, in Tartagal, in the Salta province, Argentina, February 26, 2020. Picture taken February 26, 2020. REUTERS/Ueslei Marcelino

A couple pass a sign outside the Royal Victoria Infirmary, where two confirmed coronavirus patients are being treated, in Newcastle, Britain February 1, 2020. REUTERS/Scott Heppell

A general view outside the Royal Victoria Infirmary, where two confirmed coronavirus patients are being treated, in Newcastle, Britain February 1, 2020. REUTERS/Scott Heppell

An ambulance stands near the entrance to Royal Victoria Infirmary, where two confirmed coronavirus patients are being treated, in Newcastle, Britain February 1, 2020. REUTERS/Scott Heppell

A view shows Queen Victoria's Statue at Royal Victoria Infirmary, where two confirmed coronavirus patients are being treated, in Newcastle, Britain February 1, 2020. REUTERS/Scott Heppell